1
general::
Phrase(s): more fun than a barrel of monkeys [and] as much fun as a barrel of monkeys
Cliché a great deal of fun. (Compare this with as funny as a barrel of monkeys.) • Roger always makes me laugh! He is as much fun as a barrel of monkeys. • The circus was more fun than a barrel of monkeys.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Very amusing or diverting, as in That video game was more fun than a barrel of monkeys. This expression, first recorded in 1895, alludes to the playful behavior of these primates.
American Heritage Idioms