Top Definition
MFO
my fucking opinion
ain't got no info, but i'll give you MFO

FWIW here's MFO
#imo #imfo #imao #lmfao #opinion
by marcus99 August 31, 2008
MFO
When your fucking a girl and she gets her period in the middle of it.. so u get blood all over your...
Dude that chick MFO'd me last night
#fuck #period #blood #dick #gross
by da troll3r May 09, 2011
MFO
www.masterforce.org The land of constant orgasms over robots.
by Hellbunny March 20, 2003
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