The coordination of a persons wrist and pointer finger, middle finger and thumb to creat a snapping sound.
Dave: Yo dawg check this *snap*
Bob: WHOAH DAWG, what was that?
Dave: That my brother is a Gangsta Snap.
Bob: WHOAH DAWG, what was that?
Dave: That my brother is a Gangsta Snap.
by Cracka November 29, 2004