Mo 

A boy that you care about.

that boy is such a Mo

Mo by carly9587634890758903 January 13, 2008

Mo 

The act of Making Out with someone. There are many different variations of Mo-ing (i.e. the Slow-Mo, easy-Mo, whoa-Mo).

Did you Mo last night?

Yeah, Felix and I Mo-ed on the dancefloor. Definitely a slow-Mo.

Mo by seriouslyawkwardturtle March 14, 2010

Mo 

Commonly used in Western States, especially Idaho and Montana, to refer to a Mormon, or member of the Church of Jesus Christ of Latter Day Saints (LDS)

He's a Mo -- he never drinks coffee.

Mo by wundersmack May 1, 2008

mo 

Can be used to replace the words 'very' or 'mad'.

That's MO ghetto, yo!!

mo by Clara July 12, 2003

mo 

slang abbreviation of motel.

if you wanna hit this ass, we can take it to the mo.

mo by tungsten September 6, 2004

mo 

short for momentum, possibly distantly related to mojo

Things had turned around, it appeared big mo was finally on our side.

As the snow fall increased, old mo switched sides.

mo by A J M January 16, 2008

'mo

short for hoMOsexual

Bob: Why has everyone been talking about Johnny?
Joe: I heard he's a 'mo.

'mo by Señor Sanchez April 16, 2017