be (as) thick as a short plank
be (as) thick as a short plank
To be remarkably stupid, dimwitted, or obtuse. I smoked a lot of marijuana when I was in high school, so I was as thick as a short plank by the time I finally graduated. Jen's new girlfriend is very nice, but she's thick as a short plank.
See also: plank, short, thick
Farlex Dictionary of Idioms.
- (as) thick as two short planks
- thick as two short planks
- be (as) thick as a brick
- (as) thick as a brick
- thick as two planks
- (as) thick as two planks