Smooth Brain


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 f-cking smooth brain put his shirt on backwards again…

that smooth brain is dumber than a pile of sh-t.

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