The act of stuffing as many people as possible into an enclosed water slide, typically with the goal of setting some town or other municipal record. It was featured in the media sometime in the 1990s when a group of high school seniors from Napa, California were seriously injured after a water slide partially collapsed due to the weight; one unfortunate young woman died at a local hospital, and many others were left with permanent disabilities including partial paralysis, brain damage and nerve pain.
Before a high school graduation:
Guy 1: Hey, did you hear that Tony's mom offered to drive him and fifteen of his friends to Wet n' Wild Orlando?
Guy 2: No I didn't! Isn't that where Mark's brother set a state record for the most people in a water slide at one time?
Guy 1: Yeah, that's the place! Let's go clogging and see if we can't beat that record!