Du Large, Bayou (doo LAHRZH, BEI-yoo), c.35 mi/56 km long, stream in Terrebonne parish, SE La.; rises S of Houma; flows SW past Theriot to an outlet to the Gulf of Mexico, SW of Caillou L.; partly navigable for shallow-draft vessels. In lower course, joined by channels to Mechant and Caillou lakes.