Bad Boy Bubby is a 1993 crime comedy-drama film written and directed by Rolf de Heer, and starring Nicholas Hope, Claire Benito, Ralph Cotterill, and Carmel Johnson.

Hope stars as the titular character, a mentally challenged man who has been held captive in his home by his abusive mother for his entire life. The storyline follows his escape from confinement, and subsequent journey of self-discovery. The film was shot on a low budget in Adelaide, and is an international co-production between Australia and Italy.

Bad Boy Bubby premiered at the 50th Venice International Film Festival on 1 September 1993, where it won the Grand Jury Prize. It was released in Australia the following year, and was met with positive reviews, with particular praise being given to Hope's performance and de Heer's direction. Although it was a box office failure, the film has gained a cult following.