WordNet (r) 3.0 (2006):

ego trip
    n 1: an act undertaken to increase your own power and influence
         or to draw attention to your own importance [syn: self-
         aggrandizement, self-aggrandisement, ego trip]

Moby Thesaurus II by Grady Ward, 1.0:

65 Moby Thesaurus words for "ego trip":
   acquisitiveness, amour-propre, autism, autoeroticism, boast,
   careerism, complacency, consequentiality, egotism,
   fish for compliments, graspingness, greed, have no self-doubt,
   individualism, interest, know it all, narcism, narcissism,
   overproudness, overweening pride, personal aims, personal ambition,
   personal desires, personalism, possessiveness, privatism,
   remoteness, self-absorption, self-admiration, self-advancement,
   self-approbation, self-centeredness, self-complacency,
   self-congratulation, self-consideration, self-containment,
   self-content, self-delight, self-devotion, self-endearment,
   self-esteem, self-gratulation, self-importance, self-indulgence,
   self-infatuation, self-interest, self-interestedness,
   self-jealousy, self-love, self-occupation, self-pleasing,
   self-respect, self-satisfaction, self-seeking, self-serving,
   self-solicitude, self-sufficiency, self-worship, selfishness,
   selfism, smugness, vaingloriousness, vainglory, vainness, vanity