U'm a Monkey's Uncle is the 110th short subject starring the Three Stooges.
The Stooges are cavemen living in the stone age. They must tend to their daily chores, consisting of mixing milk, hunting fish, and gathering eggs. Such is life in the prehistoric times.
That afternoon, Moe has a date with his girlfriend, Aggie (Virginia Hunter). Shemp and Larry want to join, as Aggie has two sisters for the boys, Maggie (Nancy Saunders) and Baggie (Dee Green). When rival cavemen allege that the Stooges stole their women, a fight breaks out, with the trio catapulting rocks, mud and eggs at the cavemen.