Top Definition
A sexual fetish in which the subject inserts his hard-on into a fish filter and attempts to achieve a perpetual suck without getting his hard-on stuck in the filter's fan.
Ashley: (in the bedroom) "I wanna try something new with you!"
Hugo: "Wanna watch me filter fuck while I suck your ass?"
by Finding Manhood June 27, 2017

Mug icon
Buy a Filter fuck mug!