A person who talks excessively about themself. / A person who believes in his or her own importance or superiority. / (nonstandard, by confusion of the similar words) An egoist (advocate of egoism).

in an egotistic manner

Synonym of egocentric

Alternative form of egotize

present participle of egotise

simple past tense and past participle of egotise

The activity of going on an ego trip

Third-person singular simple present indicative form of egotise

The deification of one's own self. / The view that the idea of God is nothing more than a conception of the self.