A person that has sex with a large number of persons. i.e. sex addict, finding any hole to hide in.
"John is such a crotch roach. He will fuck anything."

by Blue Lagoon Under Shining Moon January 24, 2009
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A person who's venereal health is in serious question and there is a significant chance that sexual conduct will result in in contraction of a STD.
Dude, you don't want to take home Carla. That girl is infested with crotchroaches!
by bearface83 October 22, 2007
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