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term of endearment, usually indicative of someone or something (i.e. pets) who occasionally farts, but you like them anyway.
Come here you little fart monkey, I want to give you a hug.
by Peter Thaddeus May 30, 2006
a dog who farts constantly and does not come when you call them
My beagle is the biggest fart monkey I know. All he does is chase sticks.
by catherine mary August 13, 2008