1 definition by Nick Bowling Green

To snort a small amount of cocaine from the creases of your knuckle. Usually the most discreet way to snort in public (club, party, street) so that no one will suspect anything.
Ben: Did you see that chick knuckle bump?

Tice: I sure did.
by Nick Bowling Green April 25, 2006
Get the knuckle bump mug.