What does OS mean?operating system
Other definitions of OS:
All of our slang term and phrase definitions are made possible by our wonderful visitors. If you know of another definition of OS that should be included here, please let us know.
How to use the term OS:
There are no example uses of OS at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:
A woman's large breasts. implying bra size.
Said with a smile