Osn 

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.

Osn by DatNigga4rmOuterspace May 25, 2009

OSN 

means "Oh shit nigga". meant for black people who think "OMG" is to white.

"OSN did you see that chick?!?"

OSN by jakemebabe101 May 25, 2009

OSN 

A black version of OMG
stands for: Oh Shit Nigga

Devin: Damn, that girl is a double D!

Zavier: Osn! Foreals?!

OSN by Hagigamafuh May 25, 2009

OSN 

OH SHIT NIGGA

4 black people to use instead of OMG

OSN run that nigga gotta a gun

OSN by adrian kilpat. July 5, 2009

osn 

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?

osn by BaltimoreSunshinee. May 28, 2009

osn 

A CAPPER WHO SUCKS OFF LEBRON AND RIDES RUSSELL WESTBRICK

OSN BUGGIN OUT

osn by Mowaffles September 5, 2021

OSN 

Online Social Network

See, Perils and Possibilities of Online Social Networks

"Moreover, if it was posted publicly on an OSN site or blog..."

Facebook is an OSN

OSN by anona. December 5, 2011