godan verb (-ru), intransitive verb
lean back arrogantly; throw oneself back; puff out one's chest
Physical posture of leaning back with chest out, often in a chair, conveying arrogance or self-importance.
社長は椅子にふんぞり返って話を聞いていた。
The company president leaned back arrogantly in his chair while listening.
彼はソファにふんぞり返り
He threw himself back on the sofa and crossed his legs.
godan verb (-ru), intransitive verb
act haughty; behave arrogantly
Attitude or behavior marked by arrogance and condescension, not necessarily a physical posture.
新人のくせにふんぞり返るな。
Don't act so haughty when you're just a newcomer.