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

AYMF
are you my friend

PMFSI
Pardon Me For Saying It

NSAS
No Strings Attached Sex

P&C
Point and Click