A Game Where you cuff Your Hand and Your Enemys Hands into One, both Lifting Your Thumbs And say '1,2,3,4, i declare a thumb War!!'(maybe something other) and try to pin the enemys Thumb under yours. You may only use 1 hand. the winner who pins his enemys thumb down for a short time(5-10 seconds) wins the so called war.
On urbandictionary, a thumb war consists giving your own definition a thumbs up and giving a rival's definition a thumbs down on a daily basis while said rival does the same for himself. A thumb war is won when one of the contenders forgets to vote and/or gets a life.
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