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

WYGISWYPF
What You Get Is What You Pay For

AIM
AOL instant messanger

FMTKFYTFO
For Me To Know, For You To Find Out

HAR
Hit And Run