Douglas Harper's Etymology Dictionary
self-aggrandizing
1798, from self- + aggrandizing (see aggrandize).
Wiktionary
self-aggrandizing
a. Describing actions intended to make oneself seem more important. boastful.
WordNet
self-aggrandizing
adj. of or relating to or characteristic of self-aggrandizement [syn: self-aggrandising]
exhibiting self-importance; "big talk" [syn: boastful, braggart(a), bragging(a), braggy, big, cock-a-hoop, crowing, self-aggrandising]