Short for the word smokeshow. Indicating someone is absolutely and utterly stunning. They are so hot that smoke is now surrounding them making it almost impossible to touch them. But you cannot resist a smo'.
Hey bro, check out that girl over there, she's a freakin Smo'
by The Bloke. March 1, 2011
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Guy 1: Dude youre really acting gay today. Guy 2: SMO SMO!!!!!
by iRyan March 4, 2009
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An acronym for an extremely heavy person. It stands for Super-Morbidly Obese.
If I fly coach, I have to buy two tickets because, being a SMO, I can't fit into just a single seat.
by webgrunt2 December 18, 2007
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a really close group of FOUR friends. they represent a "square" hense the 4 people involved.

crazy, fun, loving, caring.
"We are all SMO's you guys!"
"We stick together no matter what, even in Alaska."
by taystabby January 18, 2010
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A person who is mean for the sake of it, usually without reason or intent, but is mean anyways. Smos can be classified further into "bosmos" and "prosmos," depending all on their relative smo-ness.
Very different from a "mo," which is just a smo wannabe.
Izzy: Hurry up! Its psych!
Kevin: Oh my god you smo, you're not even waiting...
by bcut October 18, 2007
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Acronym for the ever popular "Suck Me Off" phrase. Is also used to replace the phrase in a quick manner.
1. Gotdammit, you and your farking dog can SMO 2. #Kvidzone can SMO
by r0b October 25, 2003
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Stimulate Multiple Orgasms. The art, perfected by few, of stimulating a woman into multiple orgasms.
Wow he really knows how to press my buttons. He SMOs like the rushing waves of the crashing sea.
by littlemissperky March 5, 2008
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