m.o. 

means your special as in your crazy, wild, retarded.you dont have a care in the world and you act that way. all negative

yo, that dude is m.o. you didnt see how he ran up on that kid and just slapped him

m.o. by cheli-chel January 13, 2009

M. R .P 

a group of immigrants at WWHS who think they own the school when really they belong in other countries. rarely seen at social events because they are too hot to hook up with girls. many think they'e gay, others just simply think they're foreign. WARNING: extremely difficult to engage in intelligent conversation with mrp members because english is NOT their native language

holla at my fellow members: exclusive MRP bond sesh at mi casa after homecoming we will be deciding if the kappa boys are allowed in our group

M. R .P by MRP4LIFE November 17, 2004

m'kay 

its like okay but slightly different. i came up with it one day when i was talking and it just came out.

its easy m'kay. m'kay now what. you got that m'kay.

m'kay by sean March 9, 2005

m-unit 

1) the punk bitches of Rock-Town

2)no where near as hardcore as the J-Crew

1)M-Unit just got their pussy asses beat by the J-Crew.

2) Look at that M-Unit fag crying like a little girl with a skinned knee.

m-unit by Mattizzle March 17, 2004

m-u-ing 

pronounced Em-you-ing
Mutual Understanding
used to explain a romantic relationship where two partners are not going out, for whatever reason

Guy 1: hey, dude, is that girl you were with your girlfriend?
Guy 2: umm, no, we're kind of m-u-ing

m-u-ing by Synovial_boy September 16, 2008

M.A.S 

moist ass syndrome or sweaty butt crack

I took off my pants and sat down and felt M.A.S

M.A.S by Fox the FC Ninja August 2, 2008

M.A.G.

abbreviation for Male Ass Grabber

dude you are such a M.A.G.

M.A.G. by dc of lv December 19, 2008