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

Mo 

A fly character also referred to as BDK. Smart and clever which is why he always puts down laith. look up laith definition. usually of African decent. never takes NO for an answer.

yo look at that dude man he's so mo.

Mo by nappa man K June 10, 2009

Mo 

A white male nigger lover from the boston area who says r at the end of every possible word. He gives JUG for eating in class, and is most likely jewish.

kid: is that mo?
kid2: dude thats so mo! he has a black wife!

Mo by shizznit May 18, 2004

Mo 

Mo is another way of saying no, just cuter and better.

"Mo!" said Sally the five-year-old "I won't cwean my woom!"

"Mo way! You are way cuwter than my ex!" said John to Tasha in his cutesy girlfriend voice.

Mo by smahteepants July 20, 2009

Mo 

A slow person.
Short for Mo-mo.
...Idiot...

I can't believe he just said that. He's such a mo.

Mo by bizrisi February 11, 2010