be (as) daft as a brush
US /bi əz dæft əz ə brʌʃ/
UK /bi əz dæft əz ə brʌʃ/

1.
sangat bodoh, sangat konyol
to be very silly or foolish
:
•
My uncle is as daft as a brush, always telling silly jokes.
Pakcik saya sangat bodoh, selalu bercerita jenaka bodoh.
•
You must be as daft as a brush to believe that story.
Anda mesti sangat bodoh untuk mempercayai cerita itu.