Top Definition
An insult which has evolved from shit-head.
Describes a man or woman receiving anal sex then performing fellatio on the feces covered member, thus getting feces in ones mouth.
Jill: Why do you call him a poo mouth?
Andy: Because he lets men have sex with him in the bum and then gives them a blowjob thus getting poo in his mouth. Hence, poo mouth.
by bogart27 June 14, 2007

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see poomouf
by Anonymous September 01, 2003

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