What does TSIF mean?
Thank Science It's Friday
Other definitions of TSIF:
All of our slang term and phrase definitions are made possible by our wonderful visitors. If you know of another definition of TSIF that should be included here, please let us know.
How to use the term TSIF:
There are no example uses of TSIF at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:

AABF
as a best friend

CLASS
Cool

YBIC
Your brother in Christ

DLBBB
Don't let bed bugs bite