American Chopper is a reality television series that aired on The Learning Channel (TLC) and was produced by Pilgrim Films & Television. The series centers on Paul Teutul, Sr. and his son Paul Teutul, Jr. (also known as Paulie or simply Junior), who run a business creating custom motorcycles in their workshop, Orange County Choppers in Newburgh, New York. The contrasting attitudes of the two men and their propensity for sulking often lead to fiery, but humorous, exchanges as they meet unusually short deadlines for building distinctive custom choppers.

Source: Wikipedia.org