Psycho Girls is a 1986 Canadian slasher film directed and co-written by Jerry Ciccoritti and starring John Haslett Cuff, Darlene Mignacco, and Rose Graham.
[1] The film was picked up for distribution by The Cannon Group, Inc. and was part of a large slate of projects written off as a massive loss for the company.
[3] Writing in Psychotronic Video, Michael J. Waldon noted that the film had "a surprising, bizarre edge," adding "PSYCHO GIRLS is the most warped.
His story is about a woman in an asylum since she was a child, for killing her parents by putting rat poison in pancakes(!).
She escapes to terrorize her sister, and in a shocking sequence, she and two sadistic, laughing maniacs kill people during a dinner party.