Definitions by Satch, MD

knuckle tap 

Commonly referred to as dap, a fist on fist greeting traditionally given as a sign of respect. However, "knuckle tap" is most often used amongst Caucasians.

Daniel: "I played a superb match of polo the other day, and I received several knuckle taps!"

knuckle tap by Satch, MD November 26, 2007