The actual difenation of this word is a verb meaning the act of being a pimp.While speeking with a girl at a club it is often said one is pimpen.
It later evolved into a term as a greeting like wassup pimpen. The greeting became accepable after the word playa was ligitized as a greeting around 2000 era like wassp playa. The greeting verson oringated in the Ingleside district of San Francisco

one who is becoming a pimp, a pimp in the making, a jr.pimp,