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The annoying know-it-all person on a show that won't shut up about being right. Usally the smartest person of the show, that is always right and is the ballance so the show won't look senseless...
Stan marsh, Brian, Sandy Cheeks, Lisa Simpson, Twilight Sparkle are the voice of reason of their respective shows.
by torriccelli August 17, 2011
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Nov 27 Word of the Day
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.
by Tip Tank May 14, 2011
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