What one says when one has had enough of someone's shit with whom they are conversing electronically.
Popularized by a prank caller on YouTube who recorded previous soundboarded phone calls against an irate black man. Using said recordings, the prankster called the irate black man and proceeded to use the man's own prerecorded voice to prank call himself. The defined phrase was uttered in the slew of hilarious, foul-mouthed ramblings of the man.
Search 'Irate Black Guy Calls Himself' on YouTube to hear the phrase.
I AIN'T NEVA BEEN CALLIN YO CRIB! NAH FUCK DAT! MA DICK HARD MEET ME SOMEWHERE, MOTHA FUCKUH!