MOS

Man on the side; meaning a man you have secretly in addition to your current relationship. Sometimes developes into a boyfriend/girlfriend relationship.

I'm going to LA to meet my MOS for a great weekend away from the hubby.

by Cali 521 August 19, 2008

mo

Very or extremely

Mo fat ... very fat

by Anonymous November 3, 2003

Mo

a shorter version of mother Fcuker

Shut up you Mo!

by cait March 14, 2004

mo

my bestest friend...everyone at pueblo luvs mo!!! even the preps like him...he is a great boyfriend....but he gets too afectionate....tight playa....all the girls like him!!!!

omg mo....we all luv u so much....u r like my bestest friend!! luv ya!!!

by oriana November 24, 2004

mo

Short for mom, although mom is pretty short already. Whatever.

Hold on, I gotta call my mo.

by sea turtle December 27, 2008

mo' money, mo' problems

Some people think that having a lot of money would lead to problems

Ol' Dirty Bastard expresses how he feels: "Mo' money, mo' problems my ass, you is a naive cat if you still think that." - ODB "Pop Shots"

by FlyAway July 22, 2011

mo

verb, "to do a mo", to fail at ones objectives - referencing Mo the bartender in popular cartoon sitcom "The Simpsons"

guy 1: hows your coursework going dude?

guy 2: I quit university...

guy 1: What with only 6 months left to go??? You doing a mo man

by warblings December 5, 2010