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Slang for moped, used to describe the sound made by a moped and other small vehicles, that seems to sound like a cockroach farting - if indeed cockroaches do fart.
*Chav drives past on moped*
Person 1: Oh look, a farting cockroach
by matrixbadger December 04, 2007
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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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