What does OSIM mean?
Oh Shoot It's Monday
Other definitions of OSIM:
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How to use the term OSIM:
There are no example uses of OSIM at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:
you funny mother f**ker
How Ya Doing
In My Humble But Correct Opinion
laughing out loud and rolling on the floor