A threesome involving two men and one woman. There are several options for who actually has sex with whom:
(1) the woman in the middle;
(2) one of the men in the middle;
(3) everyone has sex with both the others.
Thanks to Lara, I managed to get Toby into bed on Saturday; he went for an MMF.
by OrangUtanUK June 18, 2003
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Threesome involving 1 female and 2 men. The letter order represent who has sex with who. In this case one man in the middle. He has sex with both the female and male partner.

This is the correct definition.
I have had a threesome with two men but it was mfm. I want to try it mmf. I want my ol man to fuck the other guy while that guy fucks me
by Oracle❤ February 20, 2018
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Acronym= Male Male Female

A threesome with 2 men and a woman. The men are most likely bisexual.
Theres a hot new MMF video on that website.
by ron October 16, 2004
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MMF is when 2 males and one female have sex in 1 bed at the same time.
Jack: hey Zac,
Zac: ya?
Jack: wanna come over to my house and have sex?
Zac: with you? your damn gay!
Jack: ....
jack: i mean with my girlfriend too...
Zac: you mean that hot chick that gave you that blowjob?
Jack: ya...
zac: k, ill go
Jack: will you give me a handjob too?
Zac: i knew you were gay! you just wanted to hump me!
Zac: FUCK OFF, BITCH!
Zac: YOU JUST WANT TO DO MMF!
by 40yroldvirgin November 8, 2006
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MMF is threesome with two bisexual men and a woman. Unlike MFM, which happens with two str8 guys and a woman.
Marko: My wife and I had MFM with some guy and it was great. Now we want to try MMF too, I want them both to give me a blowjob.
by Mangasevic November 28, 2017
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"make money fast"

Also known as a scam, pyramid scheme or ponzi scheme.
"I know a really good MMF where you can make tons of cash!"
by HighTechGeek November 26, 2008
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Magical Motherfucker. A man who is a master in sexually pleasuring a woman
I hooked up with a MMF last night and he had to peel me off the ceiling his oral game was so strong
by dreamyk February 22, 2016
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