The newest trend teenagers are participating in. Typically they'll be in class - though some do it in their friends' houses - where they'll announce their need to go to the restroom. Regardless of response, they'll run to the nearest door, drop trow, and shit furiously. As the shit hits the floor, everyone who knows what's going one is supposed to yell "ZAGGLE".
Don't sit by the door; Zaiden is on a zaggling streak.
Mom, we got zaggled today.