[go into a tailspin] or [go into a nose dive] {v. phr.}, {informal} To fall or go down badly; collapse; give up trying.
* /The team went into a tailspin after their captain was hurt, and they were badly beaten./
2. {informal} To become very anxious, confused, or mentally sick; give up hope.
* /The man went into a tailspin after his wife died and he never got over it./