godan verb (-ru), intransitive verb
throw one's chest out; hold one's head high
Describes a posture where one leans back with chest puffed out, often conveying arrogance or pride.
彼は成功を自慢してそっくり返っていた。
He was throwing his chest out, boasting about his success.
社長はいつもそっくり返
The company president always walks with his chest puffed out.