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15.
Meaning ass or buttocks (as in "pratfall"), but used pejoratively as an insult.
"The man is a real prat!"

"Don't be such a prat, Charlie."
by Jack December 24, 2003
 
16.
Commonly used as an insult combined with other derogatory terms to create a mega insult.
Fuck off you scummy prat.
You silly fucking prat
by Technophile May 31, 2003
 
17.
The guys on trains who deliberately show off their new Vodafone Camera DX phones and talk about how much money they're going to make on it.

Annoying, obnoxious, career students mostly.
Guy 1.Check the guy playing with his tones over there.

Guy 2.Christ, what a prat.
by Biafra J July 12, 2004
 
18.
similar to twat, to be a twat, idiot stupid - cunt- fool
mark fenn is a fucking prat!
Murcott get back u prat!
by Barry Quantril January 27, 2003
 
19.
A word used in England by the English to describe persons with characteristics unique to the English.
When George from Liverpool called Trevor from Manchester a prat and a wanker, Trevor responded, "So are you, mate, as we're both Englishmen."
by boutsos May 23, 2005
 
20.
Alternative spelling for the surname of Angela Pratt, Head of Sixth Form.
Guess what? Prat's just closed the CR again, because SOMEBODY MOVED A CHAIR!
by Bob Gurch March 03, 2005
 
21.
Any American in general.
Bloody yanks, thinking they're so big. Useless prats.