An exclamation to be shouted as loudly as possible in competition with others, the winner being the one who shouts the loudest. Usual competitions take place in public settings such as malls, classrooms, and libraries. The competition is usually refered to as Penis Wars
(in the library)
John: Hey Mark, do you want to play penis wars?
Mark: Sure, I'll start ... penis.
John: ... Penis!
Mark: ... Penis!!!
John: ... PENIS!
Mark: ... PENIS!!!
Mark: ok, you won.
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