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mo
1)Short for mom
2)Short for more
3)Short for moron
4)nick name
1)But MO!
2)I'd like some mo, please.
3)Shut the fuck up MO!
4)His real name's marcus, but we call him mo
by Sylk Cream October 05, 2005

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Better than Taco Bell in every way.
"Welcome to Moe's!"
by Pierre Chang May 16, 2009

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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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Mo
Someone who is a sexy beast or originates that of sexy beasts.
Woah....he is such a mo!
by Chuckster Norris March 11, 2010

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Mo
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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Mo
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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Mo
Short for Molybdenum, has an atomic number of 42, (the true meaning of life according to Deep Thought, the computer from The Hitchhikers Guide to the Galaxy).
Oh, Mo, what would I do without you.
by m0llyBd3nim42 December 21, 2016

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Some one who is not related to you but is older mentally and is close enough to be your sister.
Sarah is My M.O.S
by Savage16 May 30, 2016

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