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An insult referring to the absence of wrinkles present in the human telencephalon(cerebrum) -- the largest region of the mammalian brain. Literally implying idiocy at a physiological level.
Those smooth-brained idiots voted for G.W. Bush twice!
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A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...
That smooth brain is dumber than a pile of shit.
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J: O, you have a smooth brain
O: Does this mean I have a cute brain?
*L, M, N, O, and P all start laughing*
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Opposite of big brain. Smooth brain refers to an idiot or someone dumb. Neuroscientists believe the more folds you have in your brain means the smarter you are. Therefore if you are called smooth brain, you have less folds and therefore dumb.
How did you forget to lock the door? Good move, smooth brain.
You don’t know basic math? Smooth brain 🙄
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adj. word to describe people that are slow or stupid
adj. describes unfunny, uncool people that are lame
“Oh look at Marquis, he’s so smooth brained”
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A derogatory term used to describe someone after they have done something unintelligent, clumsy, or foolish. This term implies a below average intelligence due to an abnormally shaped brain. The expression is used almost exclusively for criticism.
Dude 1: Hey, did you hear that Mike literally got in an accident with a parked car yesterday!
Dude 2: Ya, I cant believe it. What an absolute smooth-brain.
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Your brain doesn't work right and the gears don't function right. Otherwise said as you are stupid, dumb, an idiot.
Hey Darrell those eggs go in the fridge you smooth brained mother fucker.
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