a rare phenomena in which a woman has produced all 3 colours of a traffic light in her toilet. can only occur if she has her period, her pee is yellow, and for some reason she had one of those green shits.
girl: oh man! i dropped my glasses in the toilet the other day and it was after i filled it with everything a girl could possibly fill it with!
guy: oh, you mean had traffic lights?
girl: what?!?! where did you get that word?