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KD
Since: May, 2009
2020-07-17 10:07:27
It's not an exact match, but it's pretty close to Knuckle Cracking. I'm sure I've seen lot of instances involve doing both punching and cracking.

A badass or violent character gets ready for a fistfight by punching his own hand softly - usually, the character is a bully, and the scene fades to black so we don't see the actual beatdown.