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Blue grabs is where you have a fungal infection which grows on your toenail which grows in your mouth( teeth and tongue) instead.
blue crabs is where after you suck on someones toes because you have a foot fetish and they have a fungal infection on there toenail the fungal starts to grow in your teeth on your tongue
by YELLOWDOG1996 April 06, 2010
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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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When a female squeezes and twists a man's balls till they turn dark blue. Then the male prepares for intercourse by clamping his hands like a crab.
"I was in the mood for sushi, so Sarah gave me a Blue Crab."
by calry April 22, 2007
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