thick as two short planks
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
Very stupid.
Register: informal
Where it’s used:
Used
American English
Examples
I dunno. He’s thick as two short planks of wood, but his six brothers are all banged up in here, so he’s got eyes and ears all over the prison. Auntie Flip better watch out.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “thick as two short planks” mean?
Very stupid.
Is “thick as two short planks” formal or informal?
thick as two short planks is generally informal.