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Adj.
Short for Method of operation. Latin form "Modus expeditione." Meaning what one certain person is most noted for. A certain look, way of doing things or even attitude.

There is no latin word operandi
Stan: "who do i know that likes drinking and hates zombies?"
Nate: "Man, drinking and hating zombies?! Add pirates and thats my M.O."
by Andrew Von Doom September 12, 2005
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22
A guy who is quite random and just doesn't give a Fuck about anything, he/she is extremely underrated and at times he/she is immensely overrated, he/she is the type of person who will Fuck you over without even knowing it and is very funny, also really good at impersonations but something makes it seem as if he is attracted to the same sex
Yo mo, why are u staring at that guy, are u gay
Hahahaha, man that is hilarious
What the actual Fuck mo, why would I tell her I have a crush on her
by Kyle Johansson December 19, 2016
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23
Refers to a member of the Black Peace Stone Nation. A Mo is an abbreviated form of the word Moorish which refers to a Moor (a person of African descent). This name was adopted by the Black Stones when Jeff Fort (Chief Malik) restructured the BPSN nation to follow after Islam, specifically the Moorish Science Temple Muslims.
What up Mo? All Well Mo! What'z good mo?
by 5 Star Elite January 21, 2008
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24
A cool guy who always knows what to do in every situation. The complexity of his personality makes up for the simplicity of his name. He has many secret hobbies and is good at most things he does. Everything he achieves is a result of hardwork and passion.
Did you see that?

Dude, you totally went all Mo on his skinny white ass.
by Pro-mo February 04, 2010
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25
A term used by black urban youths in DC. Can be used the same way "dawg" or "homie" is used.
Damn moe! I aint seen you in a minute!
by lowkee642 October 05, 2005
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27
1) short for Captain Morgan's Spiced Rum
2) short for "More"
3) a nickname for a lot of names, like Melvin, Mohan, Moseph, etc.
Mo, if you drink any mo' Mo you'll be on the flo'.
by Nick D September 30, 2003
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