noun, na-adjective
coward; spineless person; wimp
Derogatory term for a person who lacks courage, willpower, or backbone. Often used as an insult or in self-deprecation.
あんな腑抜けに何ができる。
What can a coward like that do?
彼は腑抜けだから、決断できない。
He's so spineless he can't make a decision.
Compound of 腑 (ふ, 'gut, viscera') and 抜け (ぬけ, 'missing, lacking'), literally 'lacking guts'. The figurative meaning of lacking courage or spirit is an extension of the idea that one's innards are missing.