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1) Any induvidual who enjoys performing the act of anal sex by exploring the cave of the unknown with his penile probe. See also ass spelunker
Whoa man, that Mario is such an ass stabber. He just loves to stick his johnson up the hershey highway.
by Sunny G September 16, 2005
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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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