Definitions by Dogg Tagg

pac 

A shortened version of Tupac Shakur's (AKA 2Pac, Makaveli, The Don Kiluminati)name, given to him by those who seem to think they knew him as their best friend or something.
E.G:

Julius/Julie = Jules
Jason = Jase
Johnathan = Johnno
Stacey = Stace
Rebecca = Bec

Bump nines off that purple,
Sittin' on the block.
And when I'm loadin up them clips,
I listen to Pac.
~Wake the Dead - The Game;Doctor's Advocate

pac by Dogg Tagg November 30, 2006

187 

Police code used for homicide. Commonly used by gangstas and rappers.

Also the name of a racing/action game, "187: Ride or Die",
and the name of a G-Unit remix of Deep Cover by Tony Yayo feat. 50 Cent

Yeah, and ya don't stop
I pull a 187 on yo muthafuckin block
yeah, and ya don't quit
'Cause G-Unit in yo muthafuckin ass bitch

187 by Dogg Tagg November 29, 2006