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8.
oso
mafiOSO, mafia, mob, vice lords, CVLN
I'M OSO FOOL, he's traight oso dog
by koop da kid April 24, 2006
 
9.
OSO
A big, fat, lazy person, with no concept of work ethics. May be overheard uttering "you know what?" This person claims, "I only eat one meal a day?" Tells co-workers to focus more on their jobs and then excuses himself for a 3 hour lunch.
Father to son: "Son, you keep slacking like that, you'll end up an Oso."
by Ted Kamprad April 20, 2006
 
10.
An acronym for the term "On some other shit"

It is used to describe someone being off topic or saying something extremely irrelevant to the situation. (Or blabbing on about a bunch of nothing)
Bitch, you is OSOS.
My girlfriend is always OSOS!
I'm not even talking about that, you OSOS.
by lisa4queen August 20, 2014