Mo 

When used in north eastern New Jersey/New York "Mo" generally stands for "Moron".

"My dad is such a mo. He got arrested for assaulting an officer again."

Mo by LK865 November 19, 2011

mo 

Mo is the name for someone's sexual side. Often times shy girls try to hide their sexual side, but Mo is the sexual beast inside them that they try and repress.

How's mo doing right now?
So that night, Mo just lifted up her legs, and things took off from there?

mo by mo. May 30, 2006

Mo 

Missouri.

Im From the Mo. ya know?

Mo by CnClear March 2, 2011

mo 

if u are referring to a blood, and u dont no their name or if a crip call u cuz, u can respond back wit mo'

wut u doin cuz? Im chillin mo'

mo by christy j March 3, 2008

Mo 

Homo (Gay-Someone that likes the same sex)
Or somebody that just isn't with the program.

That man is mo.

Mo by Casino516 February 19, 2009

mo 

a homosexual, one who is acting in a gay manner

That guy is a mo because he is wearing capris

mo by Jaysliv March 24, 2003

Mo 

adj.
-Meaning very, largly,or alot.

"Dude that was Mo cool"

Mo by K-nott July 15, 2005