M.U 

m.u or mu is an abbreviation that means "Mutual Understanding." It's when two people like each other but won't commit to a relationship.

me and julia aren't together, just m.u.

M.U by kimkikay March 24, 2020

m.u 

make up

1. hayy.. gusto ko tanggalin m.u ko..
2. cant take off my m.u
3.

kris 3:56:45 AM
di ko nagawa mg bura ng m.u ko

m.u by gagongdj December 7, 2010

M.U. 

M.U. Mutual Understanding. This meaning can be defined in two ways:

a. 2 people like each other but aren't in a relationship
b. A talking stage between two people who like each other

N: Hey, aren't they a M.U.?

M.U. by Rocksssssssssssssssss October 23, 2022

M.U. 

Abbreviated for the phrase, "Mobile Upload." Most commonly used on Facebook. Only those deeply affiliated with Mobile Uploads can use it. "Mupload" is the immature form of M.U.

That's such a cute m.u.! Let's upload it!

M.U. by musforeveR!!!! January 26, 2010

M.U.G.E.N

A freeware game engine that allows you to play 2d fighting matches with an unlimited number of characters and stages. Infinitely customizable, mugen facilitates users' creativity and artistic skills as they create the various aspects of the game. First released in 1999 by Elecbyte, the community has thrived even in spite of the company's sudden dissolution in 2003. M.U.G.E.N. may be the best kept secret of the gaming community!

I collected over 2500 characters for M.U.G.E.N. in just three weeks!

M.U.G.E.N by The D August 11, 2006

M.U.N.

Acronym for "model United Nations," either a club or class, usu. in high schools; an extremely time-consuming activity where one student learns about international policies and takes on the role of a delegate for a particular country to discuss any given topic.

(Other-- Known to cause high school students to stay up late in researching.)

"I'm representing France in the committee of IAEA," said the M.U.N. student.

M.U.N. by Strokes fan February 1, 2004

M.U.G.E.N

A 2D fighting game engine, which can (in theory) be customized easily by adding new characters, backgrounds, sounds, and HUD elements (energy gauges and such).

The theory comes from the fact that the majority of M.U.G.E.N's character creators are whining bitches who lack any ability to share.

Apparently, taking a character and hosting it on your own site (known as warehousing) is an unimaginable wrong that you should be flogged for, even if you credit the character's 'creator'. Saving the 'creator's' bandwidth, and alleviating the need for people to spend hours wading through a million broken links and badly-designed sites in a multitude of languages is something that should never be done under any circumstances.

People often cite Elecbyte's discontinuing development of the software as the reason that the M.U.G.E.N community all but died. A little known fact is that the people who should have been the ones to keep it alive and fresh with new content actually killed most people's interest in the 'scene' by being possessive, whiny little bitches who decided that the best way to do justice to the concept of a nearly infinitely costomizable figting engine would be to do whatever they possibly could to stop new content from reaching people.

Man, M.U.G.E.N blows - infinitely customizable, and no-one wants to let people use the characters they stole.

M.U.G.E.N by Ulysses Wolfe November 8, 2008