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Someone with an unhealthy sexual attraction to primates. Especially Chimpanzees and other smaller apes.

May also refer to a minute person with apelike features. (Big ears, poo-flinging, a fondness of bananas or an overactive sexual libido)
"John sure does like to visit the zoo"
"No wonder, he's a right proper chimp fucker and no mistake!"
by Jarl September 13, 2006
to engage in coitus with an anthropoid ape (Pan sp.) or one who is attrociously ugly.
I can't believe she slept with him. She is suck a chimpfucker.
by Tumbleweed November 02, 2003