Definition of fist-pumping noun from the Oxford Advanced Learner's Dictionary

 

fist-pumping

 noun
noun
BrE BrE//ˈfɪst pʌmpɪŋ//
 
; NAmE NAmE//ˈfɪst pʌmpɪŋ//
 
[uncountable](especially North American English)(informal)
 
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the action of moving your arm and hand in a fist pump in order to celebrate success or victory, or to show support