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1.
A phrase used to win an argument. After said phrase is spoken, proceed to punch the opposing person in the stomach. The phrase was first coined in internet personality Linkara's review of the god-awful DC Elseworlds story "Superman: At Earth's End," when Superman (looking an awful lot like Santa Claus) shouts the phrase at chicken-headed android Ben Boxer, and then proceeds to punch Boxer's guts out.
(walks up to random person on the street) "I AM A MAN!!!!!!!!!!!!" (punches said person in the stomach, possibly rupturing his/her intestines)

And yes, even if you are a woman, it only works if you shout, "I AM A MAN!!!!!!!!!!!!!!"
by OldeSchool November 22, 2010