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A fourway sex group involving three guys and a girl or three males and a female.
Bysexual man: Dude she's not that hot but her two friends are, I wouldn't tap that but i'd MMMF them for sure.
see also. MMF
MMMF by DefinionofMMMF May 20, 2010
Related Words
Memento Mori Motherf**cker(s). Used as a hashtag on posts that remind people, in no uncertain terms, of their ultimate fate, i.e. death.
Headline: Couple fall to their deaths taking selfie at cliffs edge. #MMMF
MMMF by Prion9 September 22, 2020
"Merrit Mountain Music Festival" regretibly plays country music during the entire show, but still has a great turn out of sexy women and there hats. Rated 3rd place to get laid in Playboy magasine. Full of nude women, sorta like girls gone wild but your actually there:)
i went to the MMMF and watched the wet t-shirt contest then had sex with two hot womem
MMMF by for you to decide June 23, 2003
Minding my muthafuckin business
Hey what were you doing last night?

MmMFB!!
MmMFB by BarefacedBeautyy510 April 2, 2020

mmmfreshmans 

Someone who craves freshman’s.
I’m such a mmmfreshmans.