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

1.
çok aptal, kalın kafalı
very stupid
:
•
He's (as) thick as two short planks, he never understands anything.
O çok aptal, hiçbir şeyi asla anlamaz.
•
You'd have to be as thick as two short planks to believe that story.
O hikayeye inanmak için çok aptal olmalısın.