Sheep Fricker

A Minecraft redstone circuit in which a simple redstone clock is used to pulsate a sticky piston. A lightning rod or end rod is affixed to the piston and a mob, usually a sheep, is collected in a boat and placed in front. As the sticky piston extends and retracts, the rod appears to anally penetrate the sheep, giving the circuit its name.

Also known as a sheep fucker, sheep machine, or sheep station.

Most people used redstone repeaters to power a sheep fricker, but I find that observers are easier to set up.