Crossword solvers today we have the clue Knee-slapper from the USA today Crossword. There are many meanings for the clue Knee-slapper, but only one answer fits this specific crossword. After doing extensive research, we were able to find the key for the USA today Crossword Answer. If you scroll down this page, you will be able to find the correct answer for the clue Knee-slapper.

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The answer has 4 letters: RIOT

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Last usage in USA Todaycrosswords puzzle.