expression, godan verb (-ru)
stick out one's elbows
Literal physical action of jutting the elbows outward, often in a way that takes up space or looks assertive.
電車の中で肘張ると、隣の人に迷惑だよ。
If you stick your elbows out on the train, you'll bother the person next to you.
expression, godan verb (-ru)
Figurative use: acting stubbornly or arrogantly, as if physically spreading one's elbows to claim space. Often implies an unyielding, self-important attitude.
彼は会議で肘張って、自分の意見を曲げなかった。
He was obstinate in the meeting and wouldn't budge on his opinion.
あの新人はやけに肘張っているね。
That new guy is acting really haughty, isn't he?