Jackass Presents: Bad Grandpa (also known as simply Bad Grandpa) is a 2013 American hidden camera comedy film directed by Jeff Tremaine and written by Tremaine, Spike Jonze and Johnny Knoxville. It is the second film to use the title "Jackass Presents" of the Jackass franchise. The film stars Johnny Knoxville and Jackson Nicoll and it was produced by MTV Films and Dickhouse Productions and distributed by Paramount Pictures. The film was released on October 25, 2013. Bad Grandpa has a loose narrative that connects the stunts and pranks together (in a manner reminiscent of Borat), as opposed to the three original Jackass films which did not have a story.

The film became the first installment in the Jackass film series to be nominated for an Oscar, with head makeup artist Stephen Prouty being nominated for Best Makeup and Hairstyling at the 86th Academy Awards.