Chet is a character and villain in Piranha 3DD.
He is a rude, cruel, greedy, selfish, pompous, arrogant, obnoxious, disrespectful, manipulative, iniquitous, truculent, sadistic, cunning, serious, desperate, opprobrious, argumentative, unmerciful, and impatient businessman who focuses only on the water ride park he has built and the tons of money he will make off of it.
He is also the stepfather of Maddy, one of the girls in the film and the co-owner of the park, and is very perverted. He aims the park for women and plans on seducing them into giving him money.
Chet is the owner of The Big Wet waterpark. Chet is shown to be pumping water into the park from an underground lake which means he is doing illegal activities to boost the park. Maddy is threatened into keeping quiet about it.
During the opening of the park, Chet watches in dismay as piranhas begin to burst out of the pipes and eat people. He cowardly refuses to help any dying survivors and runs. Fearing for his lives, money, and business, he runs out the park into the pool allotments. He meets a young girl whose mother has been killed by piranhas in cold blood. When she looks at him in accusation, Chet arrogantly says "It's not my fault" (when it obviously is) and gives the girl some money, callously spraying it on her mother's corpse. Then Chet gets in his truck and drives off. But he accidentally reverses over the girl and kills her. In his panic to get out, he drives into a wire and decapitates himself (most likely accidentally). His head lands in a woman's hands and then, gets thrown to the pool where the piranhas devoured him alive.
According to Princess Celestia's official journal, her younger sister Princess Luna (Tabitha St. Germain) affirms that Chet in fact dies: "Far below in a chasm as dark as his own evil soul, lay the headless body of the hateful man. No light magic would ever bring him to life again!"