ichidan verb, intransitive verb
lose one's energy; become spineless; be cowardly
Often used in the past tense 腑抜けた to describe a person who has lost their nerve or become weak-willed. Implies a lack of guts or resolve.
彼は失敗してすっかり腑抜けてしまった。
He completely lost his nerve after failing.
腑抜けたことを言うな。
Don't say such spineless things.