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1.
when someon is rappin, that mean they jus talkin bullshit
man he aint doin nothin but rappin... I aint bout to waste mah time on him..

OR

If she dont quit rappin Im a woop her ass
by Anonymous July 03, 2003
 
2.
1.Talking for an extended amount of time, while already going beyond the point of interest of the listener.

2.A verb describing the action of a person who talks excessively without a purpose or point.

1. My gurl called and was rappin' me up last night.

2. Dude was rappin' like a mug. droppin mixtapes and stuff.
by SHicks November 03, 2006
 
3.
Sweat talking a girl, to get her to got to bed with you
That girl is never going to fall for those tired raps
by Boyakasha April 09, 2005