godan verb (-ru), intransitive verb
be utterly dispirited; be completely dejected; lose heart entirely
Emphasizes a strong, often visible state of discouragement or despondency, more intense than しょげる alone. The 返る suffix intensifies the meaning to 'completely' or 'utterly'.
試験に落ちて、彼はすっかりしょげ返っていた。
Having failed the exam, he was utterly dejected.
叱られてしょげ返って
He looks like a puppy that's been scolded and is completely crestfallen.