Irving Zisman is a character played by Johnny Knoxville. He is a foul-mouthed, sex-crazed old man who constantly sets a bad example for his grandkids. He appears a couple times in the Jackass movies and more recently got his own film entitledJackass Presents Bad Grandpa. In the movie, Irving drives his grandson Billy cross-country to lay his deceased wife to rest and to drop his grandson off with his father. After Billy's father proves to be an abusive alcoholic, Irving takes him back and is last seen fishing with his grandson, after throwing his wife's body off a bridge.