1. An abbreviation for perpetrator. (Someone suspected of a crime)
2. An abbreviation for Purple Haze, a breed of particularly potent marijuana that displays purple fibers.
1. After a fed showing various mugshots and sketches to a witness, he asks, "Do any of these resemble the perp?"
2. "Smoke perp by the pound, ounce by the fifth
-Young Jeezy, "Trap or Die"