MMF

Meeting Muthah Fucka

Person always in meetings.

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MMF

A threesome that is male male female.

See also: MMM , FFM , and FFF

One(F): Yo Two, you down to MMF with Three?
Two(M): Only if Three is down for it.
Three(M): I'm in!
*then came the straight woman-who-is-with-Two-but-is-attracted-to-Three's dream threesome

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MMF

MultiMedia Fusion - a very powerful game and application creation tool. This is a very common word between "clickers", together with TGF and KnP.

MMF caused crash in EdRt.exe

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MMF

Main Mother Fucker
This could be used to describe a boss, or other leader-like figure in a workplace or otherwise.

"that guy's the MMF around here, you dont wanna screw with him"

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mmf

mental mind fuck

When the information or circumstances are too extreme to be comprehended.

"He says he loves me, but he still wants to be with his wife. It's a real mmf."

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MMFS

Makes Me Fucking Sick!

David: Did you see that stupid episode last night.
Eric: Yes, bloody hell that guy was crazy.
David: I know, MMFS!

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mmf

"mentality my friend". Mmf is used to describe people who don't know how to dress or purchase and wear an item of clothing that is just completely horrifying.

*Sees girl passing by with pink sparkly uggs* Girl 1: Did you see that? Girl 2: Mmf.. Girl 1: I know omfg.

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