A science experiment gone horribly wrong wherein a monkey is tricked to grow out of a human's ass.
"HOLY CRAP! There's a monkey growing out of your freakin' ass, man!"
by Dr. Damage November 29, 2002
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A name for Ryan and James Park at White Plains Middle School in my spanish class!!
I hate James because he is a stupid assmonkey.
by conner March 23, 2005
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/ass•mon•key/ -noun. cebus anus ~ 1. a distinct group of male primates with the intelligence level of a donkey. 2. a very harsh derogatory term used to describe a feminine male that exhibts homoerotic tendencies.
1. "Hey assmonkey, you don't bake potatoes in the microwave with aluminum foil." 2. "Assmonkey, you take alot of dick in your ass! Bye, you fag."
by reno419rockstar April 29, 2010
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An incredibly unlikely thing that has happened.
From the expression "that'll happen when monkeys fly out my ass"; if that things has happened, it could rightly be called an assmonkey. You could also call it a "flying assmonkey" to distinguish it if you had to.
by herculaneum November 23, 2006
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A monkey with an obscenely large ass, so large that its head actually goes up its ass.

You can buy them in places that are infested with assmonkeys, such as, the white house. "bo-de-gas", nigga
"hey is that derek?"

"yeah, hes a fuckin assmonkey"

"who cares"
by r0fl November 15, 2007
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A gigantic monkey with one asscrack running down its face.
canadianslook like sideways assmonkeys.Also, Eric
by NickTheBitch December 10, 2004
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Legendary computer gamer with no homosexual tendencies whatsoever. Assmonkey is said to be invincible and is feared like no other in the computer gaming world.
Oh hell, Assmonkey is playing! Lets go play battlefield instead.
by Bob~N~Donnie January 31, 2007
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