Crossbeams

[Tina]

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 shouldnt 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 [Anakins] arm is cut off.