2 definitions by JBFP

1. One who flings poop, particularly monkeys.

2. A person who reminds you of number one above.

3. Slang for someone whom you find obnoxious.

There can be a slight modification: "Hung-dung monkey" means the monkey with the big wang is a poop-flinger, for example.
That Mike can be a real pain in the ass. He's nothing but a dung monkey.
by JBFP May 29, 2008
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A penis head tainted with fecal matter from anal sex, the same head left unwashed after any sex, or the receiving of oral sexual 'services' from an unclean partner.
Keith asked his male lover to clean his 'dirty helmet' with his mouth.
by JBFP May 29, 2008
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