Muscle Tussle is a 1953 Warner Bros. Merrie Melodies theatrical cartoon short directed by Robert McKimson.
[2] Daffy goes to the beach with his girlfriend Melissa Duck, who bears a strong resemblance to Veronica Lake (voiced by an uncredited Gladys Holland), and prepares to take her picture.
An outraged Daffy confronts the muscle-bound duck (a soft-spoken yet still arrogant fellow) for attempting to steal his girl.
A glad-handed traveling salesman who happens to be nearby overhears the whole thing and sells Daffy some muscle tonic (actually hot mustard), which he thinks has made him as strong as the muscle-bound duck and just might help him win back his girl.
Daffy repeatedly falls short in his attempts to demonstrate his strength, but through a fluke (and one of the salesman's props, a "five thousand-pound" barbell), manages to dispose of his rival in the end.