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This word is used to describe a less than somewhat retarded person.Given to them because when they are usually standing around
looking into space with their mouth open and drooling on themselves.
Look at that Slack-Jawed Hillbilly standing over there picking his nose and his ass at the same time.
by Mojo Maniac July 23, 2008
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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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The state of mind a man gets into after shopping for way, way too long. Distractions (for example smoking hot girls working in shops) become objects to fixate upon. Sometimes accompanied by involuntary noises.
not only does she bag he slackjawed lets a 'Whoa!' slip out
by uncle whippity January 14, 2004
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