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a person who has been taking amphetamine to long, resulting in a rough and toothless appearance
1st man: whats up with him?

2nd man: hes been on 7 grams a day for 10 years, hes got a proper base-face innit!
by southwalessniper December 14, 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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A girl that wears WAY TOO MUCH FOUNDATION. Her face is 3 shades lighter or darker then her natural color. These girls generally have a streak of base that ends at the jaw bone. Side effects are orange streaks around the neck of shirts. They are generally under the impression that you think they have nice skin.
Gothic girls and fluff chicks make up the general population.
Denise Anne is such a base face, she got makeup on my shirt when she hugged me.
by JennyO March 17, 2009
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1.In a state of inebriation and confusion due to free-basing pill or "hard" drugs.

2.The face one makes after free basing
Did you see the look on his face after he freebased that shit?!" "Yeah man, that's a BASEFACE!
by Trevvyy April 03, 2011
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An unattractive expression made by extreme discomfort and/or severe strain. Typically used by cheerleaders.
"Shannon and Vanessa tried a new stunt, and Shannon made a crazy Base Face."
by [[A Milli]] October 28, 2008
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