(as) thick as two short planks
US /əz θɪk əz tuː ʃɔrt plæŋks/
UK /əz θɪk əz tuː ʃɔrt plæŋks/

1.
sangat bodoh, dungu sekali
very stupid
:
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He's (as) thick as two short planks, he never understands anything.
Dia sangat bodoh, dia tidak pernah mengerti apa pun.
•
You'd have to be as thick as two short planks to believe that story.
Kamu harus sangat bodoh untuk mempercayai cerita itu.