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(adjective): a person who is not liked and is therefore unwelcome or unacceptable.
(1) After I drank all the beer and wine at the first frat party in September I was persona non grata among the party crowd for the rest of my college days.

(2) After his public sex scandal Tiger Woods was persona non grata at his wife's parent's house.
by Johnny Z. Styles June 17, 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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The Institution Known As JP Morgan with Jamie Dimon as its Head
Persona Non Grata: close every account I have with that institution, make sure there is NO CONNECTION between it and any business or personal dealing Motorious is doing now, or has EVER done.
by motorious November 27, 2014
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