Riffraff is a 1936 American drama film directed by J. Walter Ruben and starring Jean Harlow, Spencer Tracy and Una Merkel.

Fisherman Dutch Muller organizes a strike with his fellow thugs from the fishery, including the beautiful but tough Hattie Tuttle, against the owners of a tuna cannery.

On the night of October 30, 1935, 40 female extras on the set, many of them elderly or in frail health, were filmed in a simulated rain sequence that included the use of a sprinkler rig, fire hoses and wind machines.

[4] Frank S. Nugent of The New York Times praised the moments of "robust comedy" but lamented the serious scenes in which a "boisterous jest skids down the slopes of melodramatic routine.

"[8] John Mosher of The New Yorker wrote a negative review, regretting that the film "leaves Miss Harlow in the background for longish and rather dreary stretches ...