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An age old tradition in the Canadian province of Quebec. This means of competition involves two combatants, the first competitor to shove his thumb up the other's anus is the defined victor. The provincial champion also gains the honor of being the leader of Quebec's Bloc Québécois Party.
"My father will not admit that I am a man, I will defeat him in a québécois thumb war." - Jim

"Mario Beaulieu is an idiot, I wish someone would just challenge him to a québécois thumb war already" - Jean
by OrangeChocolate July 20, 2014
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