The act of several guys (most commonly only two, due to logistical issues) standing around a toilet and urinating at the same time, often to save time, but also done as a drunken male bonding exercise. When the beams are crossed the Star Wars inspired phrase "I am your father" is often said due to the analogy to a light-sabre fight.

Be careful of spray. Also shouldn't be attempted with too many people at once and you should know/trust the other people, or they might piss all over you.

Also, do not try to recreate the scene where Anakin's arm is cut off.

A casual invitation / threat used by an individual that is not afraid of fucking someone up.