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A tattoo on the lower back, usually on a female which is prominently displayed in public by wearing low-cut hip-hugger pants.

Urban legend has it that this is a signal to male suitors that she very willingly does "anal".
Yo, dat white boitch wit da butt hat is motioning fo me to come over her place and tap dat ass after she gives me a ride to the check cashin' place.
by 50 Cent Crack Dealer August 09, 2004
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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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1. A lesser form of the word asshat, used in polite company.

2. An unintentional typo of "But That."
"Quit being such a butt hat in front of the kids"

"I don't know where I'm going, butt hat is half the fun."
by TheFused May 21, 2005
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A hat worn on ones butt.
That Butt-Hat makes you look sexy.
by Ellsi-Islle March 24, 2009
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