"OSN!" is an abbreviation for the commonly used ghetto phrase..
"Oh shit nigga!"
Anthony & Cuta were playing XBOX for 12 hours straight when Anthony finally dominated the game and made Cuta wish he had won.
Anthony: OSN! I dominated that game.
Cuta: What is this a contest?
Anthony: In your face!
Cuta: Wish I drove a soup kitchen van.
by Madison Ryder May 28, 2007
Top Definition
A black version of OMG
stands for: Oh Shit Nigga
Devin: Damn, that girl is a double D!

Zavier: Osn! Foreals?!
by Hagigamafuh May 25, 2009
means "Oh shit nigga". meant for black people who think "OMG" is to white.
"OSN did you see that chick?!?"
by jakemebabe101 May 25, 2009
For blacks, omg was officially ruled for whites. whenever a black person would use "omg" they would instead use "osn" which means "Oh Shit nigga!".
White person example:
Guy 1: Hey did you do biology homework?
Guy 2: Omg i totally forgot about that.

Black people
Guy 1: Ay did you do biology?
Guy 2: Osn, i forgot all about that.
by DatNigga4rmOuterspace May 25, 2009
"Oh shit nigga!"

A Black version of "OMG", which IS too white of a term to use for Blacks.

An acronym not meant to be used by anyone who isn't Black.
OSN! I lost my "Chris Rock: Bigger & Blacker" DVD!
by Oh man. o3o September 18, 2009
stands for "oh shit nigga!", supposed to be the new black term for omg (oh my god)
OSN, you heard about that dummie who give head?
by BaltimoreSunshinee. May 28, 2009
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