A person that is too far up his or her own ass to know any better. An ass muncher will always look out for number one and too preoccupied to care.
Being the ass muncher that he is, John ate the last donut and didn't even save me any.
by buzznjackal August 23, 2003
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to chow down on the anal region of another human being with pleasurable intent.
by Mr Munecricket February 22, 2009
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a true ass hole

some one who munches lots of ass
shrooms: ily bitchh.
annitto: -_____________-
shrooms: fucking ass muncher
by shroomsyo April 9, 2010
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One who munches (feasts upon) asses (generally by licking bum holes).
Bystander: Jesus Croyst! What the fuck are you doing you ass muncher?!?!
Ass muncher: "incoherent mumbling" -> "answered your own question there didn't you mate."
by Ill Doctor September 21, 2014
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An individual that bites ones butt-cheeks. Usually resulting in a case of swollen colon, staff infection, or a bite mark. Usually the butt-cheek is firm and very smooth allowing the ass muncher(s) to get the most accurate nibble or sometimes bite. people who get assmunched...usually go into a state of horniness where they start to develop long boners and occasional discharges of the vaginal canal.
Lindsay is the dumbest ass muncher. She bit Mr.Decker's wrong buttcheek. This turned Mr.Decker off which resulted in him whacking her in the face with his ballsack(s).
by rimjobstar November 11, 2007
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Someone who asks for one thing, receives it, then ditches you to get the exact same thing from a different person. Most often occurring on Clash of Clans when some one joins your new clan, immediately asks to become elder and shit, then munches on ass and leave the clans.

Oh and join the p.k. 2019 squad
Tittybiggy joined your clan

Tittybiggy: I wanna be elder

K-money: You just joined

Tittybiggy: MAKE ME ELDER OR ELSE

k-money: Alright, damn nigga, calm yo tits

Tiggybiggy was promoted to elder

Tittybiggy: LATR MWUTHOR PHUQERS

Tittybiggy has left the clan

k-money: you little ass muncher

powerfulkid: yeah... you ass muncher

kingtez join your clan

k-money: you ain't getting promoted bitch

*That was a true story, that was the conversation we had*
by monkeyfreek October 25, 2014
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