pump one's fist
Definition from Wiktionary, the free dictionary
- To thurst forward one's fist, as in celebration.
2011 January 29, Piers Newbery, “Australian Open: Kim Clijsters beats Li Na in final”, BBC:
- A nail-biting final set appeared to be unfolding but it was Li who buckled under the pressure, giving up another break of serve with a double fault and a wayward backhand in game four, and Clijsters pumped her fist as she closed in on victory.