Mother's Day is a 1980 American rape and revenge slasher film directed, co-written and produced by Charles Kaufman, brother of Troma Entertainment co-founder Lloyd Kaufman (who acted as an associate producer of the film). The plot focuses on three women on a camping excursion who fall victim to two deranged, murderous young men and their unhinged mother. The film contains elements of the satire, thriller and slasher genres.

Upon its release, Mother's Day received criticism for its depiction of violence and rape, and was banned in the United Kingdom by the British Board of Film Classification. While not a success during its release and receiving a negative reception from critics, the film has since developed a cult following. It has also been subject to critical analysis from film scholars for its subtextual commentary on consumerism and the proliferation of television in popular culture. A loose remake of the same name was released in 2010.