Ren & Stimpy "Adult Party Cartoon" is an American adult animated comedy television series created by John Kricfalusi and produced by Spümcø for TNN / Spike TV. The series was developed as a more extreme revamp and spin-off of Nickelodeon's The Ren & Stimpy Show, whose first two seasons were produced by Spümcø.

The series premiered on June 26, 2003, and was removed from the network on July 24, after airing only three episodes; the remaining episodes were released on DVD. During its short run, Adult Party Cartoon was heavily panned by critics, audiences and fans of the original series. It has been referred to as one of the worst animated series of all time.