What does YN mean?
why not
Other definitions of YN:
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How to use the term YN:
There are no example uses of YN at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:

NTHN
nothing

YRT1
You Are The One

SMHB
suck my hairy balls

RA2
red alert 2 (game)