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

T2YL
Talk to you later

GNSTDLTBBB
Good Night, Sleep Tight, Don't Let The Bed Bugs Bite

FER
For

NCS
no crap sherlock