A self-righteous tool and/or douchebag who foolishly believes that he is the embodiment of manliness. A male who is the epitome of idiocy and genuine moronic behavior.
"So I was at this party and this drunken idiot started hitting on my girl, and kept shouting about how much she wanted him even though she called him a disgusting pig and told him to leave her alone."
"Sounds like a manber to me."
"A textbook case."