fist pump
an arm motion made during intense moments of musical euphoria, defined by the outward thrusting of the fist and flexing in-between repetitions. Usually done in groups of 3 or more.  Can also be done inside a moving vehicle for extra style points and honks from random females
1. The beegees techno remix is on... it's fist pump time!

2. At the club, John likes to fist pump his way to the dancefloor

3. The guido fist pump is part of every successful man's nightlife