Mandatory Ugly Friend
Every woman has a MUF
ayon kay Junkyardjimbo88 ika-27 ng Hunyo, 2003
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"
ayon kay youre a muf ika-21 ng Nobyembre, 2010
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"
ayon kay elly zass ika-28 ng Nobyembre, 2009
Material Unaccounted For
"The missing nuclear waste is MUF"
ayon kay Randy Piper(aka Shit Goose) ika-21 ng Marso, 2005
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.
ayon kay MCLIV ika-14 ng Enero, 2010
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.
ayon kay Zirik ika-18 ng Abril, 2005
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
ayon kay Dave ika-30 ng Marso, 2004

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