How To Fist Pump Share definition Flag STEP 1: Make a fist.STEP 2: Pump it. Person: Makes a fist, pumps it.And that's How To Fist Pump. How To Fist Pump by I AM THE OTTER July 12, 2010 0 0 Get merch Get the How To Fist Pump mug. Buy Now — $32.95 See more merch