Top definition
a mock religion based around the fact if you play tic tac toe once in your life you will go to heaven. also belief that calvin is god. this religionn may sound like it is made up but the bible says a guy walked on water i think its just as logical.
christian: tic tac toe-ism is wrong and god shall punish you!

tic tac toe-ist: hey calvin am i gonna get punished?
by whatwouldcalvindo April 22, 2009
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