A Pacemaker and a Sidecar (French: L'Eau chaude, l'eau frette, lit. "Hot Water, Cold Water") is a Canadian black comedy film, directed by André Forcier and released in 1976.

The film centres on a group of residents of a rooming house in a working class neighbourhood in Montreal, who have gathered for the birthday party of their landlord Polo (Jean Lapointe), a local crime boss and loan shark. The guests at the party include Amédée (Albert Payette) and Panama (Guy L'Écuyer), a gay couple who cater the party, and Carmen (Sophie Clément), a woman who owes Polo money for her daughter Francine's (Louise Gagnon) pacemaker and decides to pay the debt off with sex. Meanwhile, Francine and her boyfriend Ti-Guy (Réjean Audet), who both dislike Polo, hatch a plot to kill him which backfires when another guest at the party dies instead.