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When you're having sex with a girl, and you put her on top and then spin her around in circles while you're inside her. The term originated in rapper D-money's remix of A Milli (viewable on Youtube).
"Girl I'ma give you the chopper."

"Oh yeah baby, give it to me good!"
by Darrennnnn June 24, 2009
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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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