as artful as a wagonload of monkeys

(as) artful as a wagonload of monkeys

Impish or mischievous. ("Cartload" can be used instead of "wagonload.") Primarily heard in UK. Don't let those boys sit together—they're as artful as a wagonload of monkeys.
See also: artful, monkey, of, wagonload
Farlex Dictionary of Idioms.

as artful (or clever) as a wagonload (or cartload) of monkeys

extremely clever or mischievous. British informal
See also: artful, monkey, of, wagonload
Farlex Partner Idioms Dictionary
See also:
  • (as) artful as a wagonload of monkeys
  • artful
  • wagonload
  • clever
  • (as) clever as a wagonload of monkeys
  • of
  • as
  • cheeky monkey
  • a silver/smooth tongue
  • silver tongue