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A gay man who picks up homeless young men for sex. The homeless young men are usually rentboys who charge very low rent. The term flea dipper refers to the fact that such rentboys must be taken home and scrubbed in the bathtub prior to sex.
Dude1: That boy that Bill left with smelled like he hasn't taken a bath in a month.

Dude2: Bill is a fleadipper. He will take that boy home and scrub him off. If you look in Bill's medicine cabinet, you will see that he always has stoked with lice shampoo and crab ointment. He keeps those products for his (cough) boyfriends.
by tolmike January 18, 2012
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