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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"hey man u wanna smo?"
"yeah lets get high"
by ethan rock August 18, 2009
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To engage in any number of sexual acts in an incredibly drunk and excessively degrading manner. Often characterized by participating in group sex, forgetting the names of partners, groping ladies in bathrooms, and giving a dirty sanchez or angry dragon. Derived from the nickname of one of the University of Washington's most infamous womanizers, it serves as a substitute for or addition to countless obscenities, vulgar activities, and everyday phrases.
I smo'd the hell out of that girl last night! What was her name again?

Baby, don't stop sucking me off, but I might throw up soon - the whole world is spinning in smo-motion!

Open wide, bitch! I'm about to unleash a smo-storm in your mouth!
by CRC November 22, 2007
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