What does YS mean?
you suck
Other definitions of YS:
-
Yours sincerely
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How to use the term YS:
There are no example uses of YS at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:

TMTH
Too much too handle

PTSB
Pass the sick bucket

TIIC
Those Idiots In Control

ASAIK
as soon as I know