Not to be confused with its sinister cousin (English Chuff Off), the American Chug Off is the harmless act of people chugging beers as quickly as possible. Whoever finishes last usually is given some sort of punishment, such as having to chug another beer. This act is typically performed by frat boys.
Jeremy: Hey want to do a chug off??
Sanders: Sure thing! You mean an English Chug Off, right?
Jeremy: No...I meant an American Chug Off.
Sanders: Nah I'm good.