be as daft as a brush

be as daft as a brush

slang To act in a strange or silly way. Primarily heard in UK. Quit being as daft as a brush—it's too dangerous to play on this busy street!
See also: brush, daft
Farlex Dictionary of Idioms.
See also:
  • (as) daft as a brush
  • daft as a brush
  • daft
  • silly as a wheel
  • (as) silly as a wheel
  • hark
  • hark at (someone)
  • (as) silly as a goose
  • silly as a goose