Yippie the Back-Flipping Dog

Yippie the Back-flipping Dog is a cute dog who performed at the USO show in South Park: Bigger, Longer & Uncut.

Background
At the USO show, while the Mothers Against Canada are preparing Terrance and Phillip  for execution, Big Gay Al announces the first act of the show, which is Yippie performing backflips. Later, when the Mole is spotted trying to get Terrance and Phillip out of their electric chairs, three army guard dogs go after him, with Yippie following behind them. He is last seen on the battlefield as the Canadians fight the American army with chainsaws.