(as) thick as two short planks

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Related to as thick as two short planks: show someone up

(as) thick as two short planks

Remarkably stupid, dimwitted, or obtuse. I smoked a lot of marijuana when I was in high school, so I turned out thick as two short planks by the time I finally graduated. Jen's new girlfriend is very nice, but she's as thick as two short planks.
See also: plank, short, thick, two

(as) thick as two short ˈplanks

(informal) (also (as) thick as ˈshit taboo, slang) (British English) (of a person) very stupid: Because she’s a model, people assume she’s as thick as two short planks, but she isn’t. OPPOSITE: (as) bright as a button
Thick is the opposite of thin and can also mean ‘stupid’ in informal language.
See also: plank, short, thick, two
References in periodicals archive ?
"But sometimes he's as thick as two short planks and it's the wife in the audience who is miles brighter."
"But sometimes he is as thick as two short planks and it's the wife in the audience who is miles brighter."