up one's own ass

Prepositional phrase

 * 1)  Having an excessively high opinion of oneself, excessively preoccupied with one's own affairs, or lost in self-regarding abstraction.
 * 2) * 16 February 2003,  - Motor Racing: Coulthard’s driving passion
 * [ on Michael Schumacher ] Considering the success and money he's earned, it'd be easy for him to disappear so far up his own arse, but he hasn't; there's something down-to-earth there
 * 1) * 9 December 2003 The Advocate (magazine) No. 904
 * It's nice to be able to look back on the thing, because I was so up my own ass at the time about everything that it was hard to enjoy all the craziness...
 * 1) * 19 February 2006  - EXCLUSIVE: ON ME WEB CAM, SON!
 * Just like Leslie Grantham who also slagged off his costars, Forgeham blasted Zoe as "egotistical" and said she was "full of herself...and up her own ass"