Idiom meaning, usage examples, facts

1. Don’t forget we’re in a library, boys. People are trying to read quietly and concentrate on their work. Stop horsing around.
2. The children should not horse around in the garage. There are too many dangerous tools in there.

Synonyms: clown around; monkey around; fool around. Horse around emphasizes the physical nature of the play whereas clown around means to act silly, and monkey around means to fiddle or tinker with something.