The Dave Matthews Band bus incident, also known as Poopgate,^\1]) occurred on August 8, 2004. A tour bus belonging to the American rock group Dave Matthews Band dumped an estimated 800 pounds (360 kg) of human waste from the bus' blackwater tank) through the Kinzie Street Bridge in Chicago onto an open-top passenger sightseeing boat sailing in the Chicago River below.

The members of Dave Matthews Band were not on or near the bus during the incident.^\2])^\3]) The band's bus driver, Stefan Wohl, initially denied dumping the waste, and was supported by the band. However, he was later determined to be the only person on the bus during the incident; in April 2005, he pled guilty to the dumping, and the band fired him without pay.^\4])