Slang Terms Beginning with O

  • OXY

    OxyContin (or oxycodone), painkiller

  • OY

    Oh Yeah

  • OYB

    On Your Bike

  • OYE

    Listen up

  • OYG

    Oh Your God

  • OYMSYP

    Open your mouth, solve your problem

  • OYO

    On Your Own

  • OZ

    Australia

  • O_O

    Confused

  • OUNCE

    28 grams of drugs (usually marijuana)

  • OUO

    Official Use Only

  • OUSU

    Oh, You Shut Up

  • OUTTA

    Out Of

  • OVA

    Original Video Animation

  • OVNO

    Or Very Near Offer

  • OVO

    Obviously

  • OW

    Oh Well

  • OW2TE

    Or Words To That Effect

  • OWFM

    Often Works For Me

  • OWK

    Other World Kingdom

  • OWLING

    Crouching and staring like an owl

  • OWN

    Beat, dominate (gaming)

  • OWNED

    Dominated

  • OWNM

    Oh Well, Never Mind

  • OWOA

    One Way Or Another

  • OWS

    Occupy Wall Street

  • OWT

    Anything

  • OWTTE

    Or Words To That Effect

  • OX

    Sharp blade

  • OTLTA

    One Thing Led To Another

  • OTMH

    Off the top of my head

  • OTMS

    Other Than Mexicans

  • OTN

    Most usages of "OTN" on the Internet these days are of Japanese origin and refer by sound-alike to the Japanese slang terms "ochin" (child's testicles) and (especially) "ochinchin" (child's penis). The term is especialy used in the phrase "gigantic OTN" meaning that a boy has a very large penis for a person of his age. As of mid-2015, the term OTN is popular primarily because of the song "Gigantic OTN" (look it up on YouTube).

  • OTO

    One Time Only

  • OTOH

    On The Other Hand

  • OTOOH

    On The Other Other Hand

  • OTP

    If you ask someone what they are doing, and they say 'otp', that means 'On The Phone'.

  • OTR

    On the road

  • OTS

    On the scene

  • OTT

    Over The Top

  • OTTH

    On The Third Hand

  • OTTOMH

    Off The Top Of My Head

  • OTTOMHAROO

    Off The Top Of My Head And Rolling Out Of Bounds

  • OTW

    Off To Work

  • OTY

    Over To You

  • OU

    Open University

  • OUAT

    Once Upon A Time

  • OUCH

    Interjection said when experiencing pain

  • OUGHTA

    Ought to

  • OTAKU

    Obsessive fan

  • OTAOK

    Over the air OK

  • OTASOIC

    Owing To A Slight Oversight In Construction

  • OTAY

    Okay

  • OTB

    Off The boat

  • OTBE

    Over Taken By Event

  • OTC

    Over the Counter

  • OTD

    Off the Derech (Way in Hebrew) - someone who is no longer observing Orthodox Judaism

  • OTE

    Over the edge

  • OTF

    Its a gang or squads for like field butt it means off the forum

  • OTFL

    On the Floor Laughing

  • OTFLMAO

    On the floor laughing my ass off

  • OTFM

    Open The Fucking Manual

  • OTG

    On the ground

  • OTGH

    On The Gripping Hand

  • OTGL

    On the ground laughing

  • OTH

    Off The Hook

  • OTJ

    On The Job

  • OTK

    Over The Knee

  • OTL

    Out to Lunch

  • ORLY

    Oh Really

  • ORKUT

    Google's social network

  • ORN

    Oh Really Now

  • ORO

    Expression of confusion

  • ORZ

    Frustration, despair

  • OS

    operating system

  • OSFA

    One Size Fits All

  • OSIF

    Oh Shit, I Forgot

  • OSIM

    Oh Shoot It's Monday

  • OSINTOT

    Oh Shit I Never Thought Of That

  • OSLT

    Or Something Like That

  • OSM

    Awesome

  • OSO

    Other Significant Other

  • OSS

    Open Source Software

  • OSSIM

    Awesome

  • OST

    On Second Thought

  • OT

    Off Topic

  • OT1H

    On The One Hand

  • OT3

    One True Threesome

  • OTA

    over the air

  • OOTC

    Obligatory On Topic Comment

  • OOTD

    Outfit of the day

  • OOTO

    Out Of The Office

  • OOTQ

    Out Of The Question

  • OOTW

    Out Of This World

  • OOYFM

    Out of your fucking mind

  • OOYL

    Out Of Your League

  • OOYM

    Out Of Your Mind

  • OP

    operator

  • OPA

    Greek exclamation

  • OPB

    Other People's Business

  • OPK

    Other People's Kids

  • OPM

    Other People's Money

  • OPP

    A snitch

  • OPPA

    Older brother, male friend

  • OPPS

    A opp is a snitch or person you cant trust there like police but not a police officier.

  • OPSEC

    Operations Security

  • OREO

    Black on the outside, white on the inside

  • ORGY

    Not Defined

  • ORITE

    Alright, hello

  • OOC

    Out of control

  • OOE

    Out Of Endurance

  • OOF

    a sigh of frustration. Same meaning as the Yiddish "oy vey" or also similar to "Oh my God!"

  • OOFT

    Sound made when impressed by something

  • OOH

    On one hand

  • OOI

    Out Of Interest

  • OOL

    Out Of Luck

  • OOM

    Out Of Mana

  • OOMF

    One Of My Friends/Followers

  • OOML

    Out Of My League

  • OOMM

    Out Of My Mind

  • OOMPR

    Out Of My Price Range

  • OOO

    Out Of Office

  • OOP

    Out Of Place

  • OOPS

    Word said after doing something wrong

  • OOS

    Out Of Stock

  • OOSOM

    Out Of Sight Out Of Mind

  • OOSOOM

    Out Of Sight, Out Of Mind

  • OOT

    Out Of Touch

  • OOTB

    Out of the Box

  • ONE OFF

    Happened Once

  • ONION

    Ounce of a drug

  • ONL

    Online

  • ONM

    Oh, Never Mind

  • ONNA

    Oh No, Not Again

  • ONNTA

    Oh No, Not This Again

  • ONO

    Or Near Offer

  • ONOH

    On the Other Hand

  • ONOZ

    Oh No

  • ONS

    One Night Stand

  • ONTD

    Oh No They Didn't

  • ONTFLMAO

    On the floor laughing my ass off

  • ONUD

    Oh No You Didn't

  • ONYD

    Oh no you didn't

  • OO

    OpenOffice

  • OO2U

    Option Open to You

  • OOA

    Out Of Ammo

  • OOAD

    Object Oriented Analysis and Design

  • OOAK

    One Of A Kind

  • OOBE

    Out Of Body Experience

  • OMDZ

    Oh My Dayz

  • OMFSM

    Oh My Flying Spaghetti Monster

  • OMFUG

    Other Music For Uplifting Gormandizers

  • OMG

    Oh My God

  • OMGA

    Oh My Giddy Aunt

  • OMGD

    Oh My God Dude

  • OMGNA

    Oh My Gosh, Not Again

  • OMGSH

    Oh My Gosh

  • OMJC

    Oh My Jesus Christ

  • OML

    Oh My Legs

  • OMS

    Oh My Science

  • OMSJ

    Oh My Sweet Jesus!

  • OMT

    One More Thing

  • OMW

    On My Way

  • OMWH

    On My Way Home

  • OMZ

    Oh My Zeus

  • ON

    Drunk, high

  • ON ONE

    Under the influence of drugs

  • ONCO

    Or Nearest Cash Offer

  • ONE

    One Love, goodbye

  • OKW/E

    OK What-Ever

  • OL

    old lady

  • OLD BAG

    a woman that was once a lovely young women that is now a lovely old woman

  • OLDFAG

    Long established member of an online community

  • OLED

    Organic Light-Emitting Diode

  • OLF

    One Line Followup

  • OLL

    OnLine Love

  • OLLG

    One Less Lonely Girl

  • OLN

    OnLine Netiquette

  • OLOY

    Only Losers Obey Yolo

  • OLPC

    One Laptop per Child

  • OLTL

    One Life to Live

  • OM

    Old Man

  • OM NOM

    Sound of eating

  • OMA

    Oh My Allah

  • OMAA

    Oh, my aching ass

  • OMAC

    One Man Army Corps

  • OMB

    On My Break

  • OMD

    Oh My Days

  • OMDB

    Over My Dead Body

  • OHW

    On His Way

  • OI

    Hey

  • OIB

    Oh, I'm back

  • OIC

    Oh, I see

  • OICN

    Oh, I see now

  • OICU812

    Oh, I See You Ate One Too

  • OICURMT

    Oh, I see you are empty

  • OIK

    Unpleasant, unpopular person

  • OIS

    Oh I see

  • OITNB

    Orange Is The New Black - A popular television series about a women's prison with multiple story lines and in it's second season

  • OIY

    Hey

  • OJ

    Only Joking

  • OJD

    Obsessive Jonas (Brothers) Disorder

  • OJT

    On Job Training

  • OK

    One Kiss

  • OKBB

    OKay, Bye Bye

  • OKC

    Oklahoma City

  • OKEY DOKEY

    OK

  • OKI

    Okey Dokey, OK

  • OKIES

    Okay

  • OFOC

    Overwhelming Feelings of Concern

  • OFS

    One Finger Salute

  • OFWGKTA

    Odd Future Wolf Gang Kill Them All (rappers)

  • OGIM

    Oh God It's Monday

  • OGK

    Only God Knows

  • OGKT

    Only God Knows That

  • OGN

    Online Gaming Network

  • OGTDA

    One good turn deserves another

  • OH

    Other Half

  • OHAC

    Own House And Car

  • OHAI

    Oh, Hi

  • OHDH

    Old Habits Die Hard

  • OHEMGEE

    Oh my gosh

  • OHIM

    Oh Hell, It's Monday

  • OHK

    Oh,Ok

  • OHKO

    One Hit Knock Out

  • OHN

    Oh Hell, No!

  • OHOTKOHOTC

    One Hand On The Keys, One Hand On The Crotch

  • OHS

    Operator Head Space

  • OHT

    One Handed Typing

  • OCO

    Oh, Come On

  • OCR

    Optical Character Recognition

  • OCT

    On Company Time

  • OD

    Oh Dear

  • ODAAT

    One Day At A Time

  • ODF

    Own Damn Fault

  • ODG

    Oh Dear God

  • ODL

    Oh Dear Lord

  • ODST

    Orbital Drop Shock Trooper (Gaming)

  • ODT

    On Dis Ting

  • ODTAA

    One Damn Thing After Another

  • OED

    Oxford English Dictionary

  • OEM

    Original Equipment Manufacurer

  • OF

    Old Fart

  • OFAY

    Offensive term for a white person

  • OFC

    Of course

  • OFGS

    Oh, For God's Sake

  • OFH

    Old Folks' Home

  • OFL

    it means oh what a fricken loonatic

  • OFN

    Old Freaking News

  • OBGYN

    Gynecologist (OBstetrics and GYNecology)

  • OBHWF

    One Big Happy Weasely Family

  • OBKB

    Okay, bye bye

  • OBO

    or best offer

  • OBQ

    Oh, Be Quiet

  • OBS

    Obviously

  • OBTW

    Oh, by the way

  • OBTWIAU

    Oh by the way I adore you

  • OBTWIAVBP

    OBligatory The World Is A Very Big Place

  • OBV

    Obviously

  • OBVI

    Obviously

  • OBVS

    Obviously

  • OBVY

    Obviously

  • OBVZ

    Obviously

  • OBX

    Old Battle Axe

  • OC

    Own Character

  • OCD

    Obsessive Compulsive Disorder

  • OCH

    Oh (Scottish)

  • OCIA

    Of Course I Am

  • OCN

    Of Course Not

  • O.O

    Very valid, pithy, suiccnct, and on point. WD.

  • O/

    High five

  • O/P

    Out of print

  • O7

    Salute

  • O:)

    Innocent, angelic

  • O:-)

    Innocent, angelic

  • OA

    Over acting

  • OAN

    On Another Note

  • OAO

    Over And Out

  • OAOO

    One And Only One

  • OAP

    Old Age Pensioner

  • OAR

    On a roll

  • OASRN

    On a site right now

  • OATUS

    On A Totally Unrelated Subject

  • OAUS

    On An Unrelated Subject

  • OB

    Oh brother

  • OBBY

    Good game

  • OBE

    Overcome By Events

  • OBEX

    Object Exchange

  • O/O

    High five

  • O

    Ounce (of drugs)

  • O&O

    Over and Out

  • O)

    Clown nose smiley face

  • O-O

    Shock

  • O RLY

    Oh Really

  • O/O