What does FIO mean?

Figure it out

Other definitions of FIO:

All of our slang term and phrase definitions are made possible by our wonderful visitors. If you know of another definition of FIO that should be included here, please let us know.

How to use the term FIO:

There are no example uses of FIO at this time. We would greatly appreciate your contribution if you would like to submit your own!

More slang terms:



With Due Respect



i will f**k your brains out


Shortening of the term "cool cat". Can be used to identify a person, whether cool or not.