(as) thick as two short planks

US /əz θɪk əz tuː ʃɔrt plæŋks/
UK /əz θɪk əz tuː ʃɔrt plæŋks/
"(as) thick as two short planks" picture
1.

bête comme ses pieds, idiot comme un balai

very stupid

:
He's (as) thick as two short planks, he never understands anything.
Il est bête comme ses pieds, il ne comprend jamais rien.
You'd have to be as thick as two short planks to believe that story.
Il faudrait être bête comme ses pieds pour croire cette histoire.