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3.
Any white person who attempts (and fails) to look cool by acting 'gangsta' - common problem.
Jordan came from a middle-class suburban household, but thought that putting on chains and adding "Sup, dawg" to conversations made him cool. Utter McNigga.
by LeWoolfe November 26, 2010
 
1.
A "McNigga" is a black man that has lost all of his street cred and negro like qualities (i.e. pronouncing it "mouth" instead of "mouff" and using "I don't know anything" instead of "Nigga I ain't know nothin"). This "unblackness", if you will, happens most frequently when black people find a steady, well paying, job and gets over their crack addiction (easing him/herself onto cocaine instead). Luckily, this doesn't happen very much.

"McNigga" can also be used as an exclamation/gibberish when one is excited or can't think of something better to say.
Ross(Ben): that nigga is watchin' seinfeld

Al taymalikshawn(Mike): McNigga!

or

Ross(Ben): you goin' to the physics review session?

Al taymalikshawn: McNigga!

Ross(Ben): I'm gon stab youse in the dick nigga!

by mike xie September 24, 2007
 
2.
You know how, in all McDonalds commercials, there is always at least one black guy? Yep, there's a word for everything.
Dude1: You why are there always black people in mcdonals commercials?
Dude2: idk McNiggas cant afford anythin else
Dude1: Lets go get big macs
by TulaneUniv June 09, 2009