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| people that are dumb as rocks (Washington Post Alex_Odeychuk) | |||
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| thick as two short planks (Anglophile); as thick as two short planks (Anglophile) | |||
| nutty as a fruitcake (Andrey Truhachev); as thick as a plank (Andrey Truhachev); as dim as a glow worm's armpit (Andrey Truhachev); as thick as two short planks (Andrey Truhachev); dumb as a rock (Donald Trump, 2018 Alex_Odeychuk) | |||
| as stupid as a goose (VLZ_58); as dense as a donkey (VLZ_58) | |||
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| as thick as a plank (тж. (as) thick as two (short) planks Баян) | |||
| тупые как валенки: 2 phrases in 2 subjects |
| General | 1 |
| Idiomatic | 1 |