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A an expression coined in urban UK, meaning "put a lid on it" or shut that mouth fast before some hears you.

-Mister Kingsley Price of capthatt.com

#keepquiet #shutup #shut up #shut your mouth
Jenny, "So as I was telling you about Abigail, she had this thing in her hand that smelt like..."
John, seeing Abigail round the corner; "Capthat!"
by gifty7 September 12, 2018
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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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2
When someone says some dumb shit and you ain't fucking with it, like you don't think its a good idea
John: aye we should go in the woods
Chris: nah , cap that
by Prettymuchahoe...woohoo August 20, 2018
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