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1.
MUF
Mandatory Ugly Friend
Every woman has a MUF
od uživatele Junkyardjimbo88 27. Červen 2003
 
2.
muf
someone who does not know the meaning of the word is a muf, until you know what it means you are one.
fred: "what's a muf"?
george:"you're a muf"
od uživatele youre a muf 21. Listopad 2010
 
3.
An acronym for the very serious disorder: Messed Up Face Syndrome.
"Ew that was the ugliest girl I've ever seen in my life."
"Yeah, she has a bad case of MUFS"
od uživatele elly zass 28. Listopad 2009
 
4.
MUF
MUF -

Abbrieviation of "Make-Up Failure".

For those girls who slap on the bronzer, and foundation, for those girls who have abnormally rosey cheeks, and for those girls who have eyes as black as the night.
1)

Girl 1: HAHAHA Did you see Jenny today?

Girl 2: Yeah, i mean what a MUF!

2)

Boy 1: I fancy some girl in my maths class... but i don't know what to do, she's such a MUF.

Boy 2: NO MAN, you can do so much better.
od uživatele MCLIV 14. Leden 2010
 
5.
Muf
Material Unaccounted For
"The missing nuclear waste is MUF"
od uživatele Randy Piper(aka Shit Goose) 21. Březen 2005
 
6.
muf
Multi User Forth

Advanced coding language used on MUCKs. When used by Zirik, it causes flooding.

MUF is frequently used when MPI proves insufficient to perform a desired function, as it has much greater capabilities. However, most consider it more difficult to learn.
Zirik wrote a program for underwater realms in MUF and inexplicably drowned the entire population of the MUCK.
od uživatele Zirik 18. Duben 2005
 
7.
MUF
Material Unaccounted For

Usually a term referring to forsaken nuclear materials. MUF is also something that black marketeers happen to get their hands on. Scary...
"MUF?"
-Solid Snake

DAVE GROSS'S (that's me ^_^ ) EDITTED VERSION:
"MUF? You mean pussy?"
-Solid Snake
"No you nitwit!"
-Kenneth Baker
od uživatele Dave 30. Březen 2004