mo 

a skinny piece of garbage who cannot get laid, see also rapist or stalker.

The mo could not get laid so he stalked and then raped a girl.

mo by ted June 13, 2003

mo 

a very homosexual black/hispanic man

Jon and Brandon are such Mo's

mo by Boboskewotentoten January 23, 2008

Mo 

Short for emo, homo, lesmo, bimo, keemo, benson leiMO, MOnster, and other words with MO in it. Common examples are when Larry, Raymond, Crystal, Jon, Alvin, Simon, Jeffrey, Benson, RayLi, RayZ, Mary, Iris, Doris, and Ryan, are being dense. People that are MO usually do stupid things like yell out car windows screaming "WEST SIDEEEEEEEEE." Also, MO people are oblivious that they are mo, which makes them even MORE mo.

This is a word that originated in San Francisco. UH HEEEEEEEEEEEe

Larry: "I want to play with a Barbie!!"
Daniel: "Don't be MO!"

Mo by dszeto1 August 3, 2008

Mo 

A girl who alays like realy ugly or stupid or odd guys and is a slut and is already pregnant

U let him have some, but he's so ugly, ur such a mo

Mo by Yada December 12, 2003

MO 

Abreviation of Musical Orgasm.

Dude 1: Whoa man, did you see John Fruscante playing Snow on tv last night?
Dude 2: no...why?
Dude 1: Oh you shud've seen it, it gave me an MO !

MO by Wookiemann January 1, 2009

Mo 

Missed oppurtunity usually in regard to an attractive male or female that you could have hooked up with.

"Did you see that girl?"

"Yeah man, total MO

Mo by Amanda0311 September 30, 2010

mo 

1. short for mom, specifically used to talk trash about someones mom when you're so fucked up your words are slurred so you just take the lazy way out.

2. short for more in the same instance, usually referring to more of whatever substance has gotten you so fucked up

1. "Yo i just banged your mo last week."

2. "Give me some mo"

mo by Yigstein's Money March 4, 2011