Top Definition
Mandatory Ugly Friend
Every woman has a MUF
de Junkyardjimbo88 27 Iunie 2003
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"
de elly zass 28 Noiembrie 2009
In radio transmission Maximum Usable Frequency (MUF) is the highest radio frequency that can be used for transmission between two points via reflection from the ionosphere ( skywave or "skip" propagation) at a specified time, independent of transmitter power. This index is especially useful in regard to shortwave transmissions.
I am trying to reach Europe on the 10-meter band, but the MUF 20.25MHz
de Klinkou 14 Ianuarie 2015
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"
de youre a muf 21 Noiembrie 2010
Material Unaccounted For
"The missing nuclear waste is MUF"
de Randy Piper(aka Shit Goose) 21 Martie 2005

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.

Girl 1: HAHAHA Did you see Jenny today?

Girl 2: Yeah, i mean what a MUF!


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.
de MCLIV 14 Ianuarie 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.
de Zirik 18 Aprilie 2005

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