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The act of inserting a finger into the anus while performing oral sex. Usually it's male to female or in the gay community male to male or female to female but could apply to female to male
I gave her "the spike" while I was going down on her. Drove her crazy man!!
by bernard August 01, 2006
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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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