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

AFINIAFI
A Friend In Need Is A Friend Indeed

DTMFA
Dump The Mother Fuckker Already

GIT
Get over it

GIGO
Garbage In, Garbage Out