fist-pumping

noun
🔊/ˈfɪst pʌmpɪŋ/
🔊/ˈfɪst pʌmpɪŋ/
[uncountable] (especially North American English) (informal)
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  1. the action of moving your arm and hand in a fist pump in order to celebrate success or victory, or to show supportTopics Successc2