The Nesting (also known as Phobia and Massacre Mansion) is a 1981 American supernatural horror film directed and co-written by Armand Weston, and starring Robin Groves, Michael Lally, John Carradine and Gloria Grahame in her final film role. Its plot follows an agoraphobic novelist who rents a rural mansion that she comes to find is haunted by the prostitute victims of a mass murder that occurred there in the 1940s.

While not prosecuted for obscenity, the film was seized and confiscated in the UK under Section 3 of the Obscene Publications Act 1959 during the video nasty panic