Short form for the word "egocentric", meaning "self-centered".
Basically
selfish, focus on him/herself rather than the benefits of whole community.
Thought that he/she is the most talented and on
top of everyone.
A:
Yo, look at this IT Manager. He's so Ego that even marked himself as the most talented.
B: Fuck it. He only knows how to send emails to order his teammates and play
politics.
A: Wait, does he belong to the team? He didn't offer
help to his teammates.
B. Ahhh, dammit.