Gimme knuckles

Another way to say fist bump

Imagine 2 people playing Darts for the same team of 4 players. One team mate scores 180 points with 3 Darts (taking the game, because their team needed to score 180 points to win the game)

Player 1: Holy Crap, 180!!
Teammate: Dude, gimme knuckles!!!
The winning team's 4 members all bump fists.