A form of English, spoken by black people. Black people tend to slip up in their speech, usually when angered, to a language that can not be easily understood. This type of language is found most often in black females.
Example 1:

Laquandah: You'z a big fat ugly bitch!
Shaniquah: What chu talkin' bout' I'ma beat yo black ass mothwerhs fuckajlk lkjasdo youiasd sdtusdpid biothviuhch the point where English turns into Blacklish.

Example 2:
Just listen to a Missy Elliot song.
by not a rascist person March 27, 2008
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