also: そっくりかえる
godan verb (-ru), intransitive verb
throw one's chest out; hold one's head high; swagger
Describes a proud, arrogant posture where one leans back and puffs out the chest. Often used figuratively for acting haughty or self-important.
See also: そっくり返る
彼は昇進してから反りくり返って歩いている。
Since his promotion, he walks around with his chest thrown out.
Don't talk with your head held so high.