The effect one gets when there are 15 or more people in a single elevator, effectively causing it to look like there are a bunch of clowns in the elevator.
Person 1: Dude, we all look so stupid in this elevator
Person 2: Yeah, that's the clown car effect for ya.
A debilitating condition in which the sufferer must use the bathroom several times a day. Very common among young people. More common to occur outside of the home.
Guy 1: Man, I gotta take a piss
Guy 2: Dude, I think you have a really bad pissability
Guy 1: Shit, I thought I was over it months ago!