Egoist
Part of speech: noun
Definition: an advocate of egoism. an egocentric or self-centered person. An egotist.
Egocentric
Part of speech: adjective
Definition: selfish, self-centeredEgotistical.
Part of speech: noun
Definition: A person who is egocentric.
Example sentence: Some people have a blog that's, like, 'Today I brushed my teeth.' Well, who cares? Who cares that you brushed your teeth. Okay - you brushed your teeth! That's so massively egocentric, it's just ridiculous.