Individuals who favor and position their ego to solely benefit their selves at the detriment of another, whether politically, in business, with personal relationships, etc. Opposed to narcissism that seeks gratification from vanity or egotistic admiration of one's idealized self image and attributes.
This relationship was a terrible one sided deal that left me hurt, which displays their ego nepotism.
An egobastard is someone who has a large ego, an ego that is not induced by anyone but themself. Though, they might have the skills/strength to back their ego up.
Girl 1: “Gosh he’s so confident. He is SUCH an egobastard”