A Holy Terror is a 1931 American pre-Code Western movie starring George O'Brien, Sally Eilers, Rita La Roy, and Humphrey Bogart.

The film is an adaptation by Ralph Block, Alfred A. Cohn, and Myron C. Fagan of the novel Trailin'!

Polo player Tony Bard travels West to investigate his father's murder, and meets Jerry Foster on a Wyoming ranch.

After being kidnapped, Tony escapes and discovers his true father.

He also learns that he was raised by another man, who was in love with his mother.