1) Audible reaction to a punch 2) Belt reaction 3) Body blow reaction 4) Breath-losing sound 5) British slang for money 6) Cartoon brawl exclamation 7) Cartoon brawl shout 8) Cartoon fight sound 9) Cartoon response to a punch 10) Cartoon sound of discomfort 11) Cartoon utterance 12) Cartoon-punch response Found on https://www.crosswordclues.com/clue/oof