Top Definition
Madiman is a species in which a girl named Madison acts like a complete man. She usually has blond hair which is always worn in a pony-tail, and a large ass, and even though she is quite manly, she still gets a lot of guys.
I just saw a Madiman! A blond girl with a pony-tail, large ass, quite manly and holding hands with a boy.
by Madiman Expert November 26, 2010

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