Comprehensive resource for understanding and mastering English idioms
The idiom "monkey business" refers to activities or actions that are not serious, important, or legitimate. It can also suggest dishonest or unethical behavior. The figurative meaning of the idiom is to describe something that is not professional or appropriate in a particular context.
The idiom "monkey business" has its roots in the early 20th century and is believed to have originated from the animal kingdom. It may refer to activities or behavior that resemble the mischief and playfulness of monkeys. The first recorded use of the idiom can be traced back to a 1928 book written by American humorist James Thurber called "The Wonderful Adventures of Mr. Chance." However, its popularity grew in the mid-20th century and became widely used in contemporary language.