A) An insult to someone's charecter and/or sexual preferences, akin to ass clown, pole smoker, ass jockey, and ass pirate.
B) Used by straight women/gay men to describe a man with a nice ass.
C) A tattoo of the Superman sheild symbol on one's ass.
-Anthony is an Ass Superman
-Anthony is an Ass Superman
-Anthony has one awesome Ass Superman.
by Clayton Bigsby April 3, 2005
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When a man goes to fuck a girl in the ass, but puts his cock only half-way in, then throws up all over his cock and the girls ass, and continues fucking her.
Person 1: "Dude, I did a half-assed superman with my girl last night!"

Person 2: "Ew! That's fucking sick!"
by Mew Novocaine November 3, 2010
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