The Topeka Fly Trap
The act of catching a common housefly, ripping off its wings and using it for sexual pleasure by laying in a warm bath with the water level just below your penis tip, setting the wingless fly on the penis tip and letting it panic and run free, stimulating your penis into ejaculation, inevitably drowning the fly in your cum. Not to be confused with the Arlington Biter or the Mikes Hard Semenade which use a horse fly and a wasp in place of a housefly.
Remember that fly that was buzzing around the kitchen? I gave him The Topeka Fly Trap.