egotesticle

adjective:

1. pertaining to or characterized by egotesticlism

2. given to talking about oneself from the perspective of one's testicles

3. indifferent to the well-being of others testicles

Usage:
used primarily as an insult to someone's attitude or personality

“Man, I swear you are so egotesticle sometimes, all you think about... rather with, are your egotesticles.”