Top Definition
When u and a friend make fists and touch um together, kinda like a handshake but more modern
Dude1: Did u get that new video game dude?!
Dude2: nah man, im saving up to take my GF to the movies
Dude1: wise man! *knuckle pump*
by Darth Tater October 14, 2005
5 Words related to Knuckle Pump

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