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Basically someone whos a major idiot, or is delusional and dumb. Acts against logic and thinks hes self-righteous. AKA: Major dumbass.

Good example: Percy from HP and from 5th book
"You stupid prat!"
by Disnchanted November 23, 2003
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2
a self-aggrandizing, pompous fuck. Someone who is full of themselves and, almost invariably, stupid as well. With a hint of 'deluded.'
"I'm getting really tired of listening to Vince brag about his conquests. What a prat."
by cyclopsca January 31, 2006
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3
Behaving stupidly, or looking stupid. A British slang word, similar to idiot.
Wearing a yellow bowtie made Bob look a right prat.
by Delpigeon July 24, 2005
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5
An English term for "ass", also used to descibe someone as stupid and arrogant.
"No, I lose all bets to the bookies. You can't change fighters at the last minute, so no, I don't have my fight do I, you fucking prat?"

-Alan Ford as "Brick Top" Polford in 'Snatch'
by VooDooXII August 23, 2006
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6
An overly pretentious person. Someone who is so obviously into themselves that others notice and they fail to realize it.
Seth MacFarlane (the creator of Family Guy) is a total prat.
by not found [Error 404] June 10, 2009
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7
A mild to moderately sociopathic person who is unable to see the impact of their behavior on others. Someone who is completely self-absorbed.
"I'm getting really tired of listening to Christine whinge about her needs. She really is a prat."
by Dobbin1969 January 22, 2013
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