The phenomenon that occurs in the men's room when the sound of one man urinating causes the other men using the facilities to begin urinating as well.
Tex: "Have you noticed that when several guys are in the men's room, they all start to pee at about the same time? It's like we're all sympottyco, get it?"
Philip: "Dude. What's wrong with you? Guys don't talk about stuff like this."