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definitions

fist pump

[fist puhmp]
noun Informal.
  1. a gesture of enthusiasm, victory, etc., in which one raises a fist and thrusts the forearm quickly and forcefully forward or downward.

Origin of fist pump

First recorded in 1980–85
Related formsfist-pump [fist-puhmp] /ˈfɪstˌpʌmp/ verb (used with or without object)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018