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Aussie Slang term describing somebody who thinks much higher of themselves than others do and makes sure to let everyone else know why he believes he is superior.
That JohnnyQuinella guy thinks he is gods gift to everyone, he is so up himself. I think everyone is tired of him talking himself up so much
by LayinYaMama August 16, 2016
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2
Or herself. Full of his own importance; self-absorbed; conceited; precious about his talents or significance.

British slang.
Stephen Fry: revered by some, considered pretty much entirely up himself by others.
by Ruffcutt February 04, 2012
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