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 March 3, 2016
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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 4, 2012
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Selfish; to not be compared to anyone else
He is all up on himself.
by -farmer62 February 8, 2016
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