The act of placing your genitals within sufficient proximity to the filter jet which circulates the water in a pool in order to pleasure one's self.
Jeff hasn't moved from that spot along the side of the pool in over ten minutes, he must be filterbating. Filterbation is best accomplished when no one else is around...
by xxCriticalMassxx Classy Masi August 6, 2011
Get the Filterbationmug.