Down and Dirty Duck

Down and Dirty Duck, first shown under the abbreviated titles Cheap! and Dirty Duck, is a 1974 American adult animated comedy film written and directed by Charles Swenson and starring Mark Volman and Howard Kaylan as the voices of a strait-laced, low-level white-collar worker named Willard and an unnamed duck, among other characters. The plot consists of a series of often abstract sequences, including plot material created by stars Kaylan, Volman, Robert Ridgely, and, according to the film's ending credits, various people Swenson encountered during the making of the film. The film received mostly negative reviews and became relegated to late shows.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.