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 likeSanta 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!!!!!!!!!!!!!!"
Tony Stark's last words before he snapped his fingers in Avengers Endgame that made your mom cry, your dad cry, your sister cry, your cousin cry, and the whole world cry.
"I am inevitable." Thanos snaps and looks at his gauntlet like oh shit. He proceeds to looks at Tony who's like 'FUCK YOU' and Tony says, "I am iron man" Then sis snapped harder than Miley Cyrus in 2013.