プログレッシブ和英中辞典(第３版)の解説
かたひじ【肩×肘】
- 肩肘張った付き合いはよそう
〔堅苦しく〕Let's stop acting so formally toward(s) each other.／〔用心して〕Let's stop being so leery of each other.／〔対抗して〕Let's stop trying to outdo each other. - 肩肘張って生きているが，実は寂しがり屋だ
「He pretends to be strong and independent [He puts on a bold front], but actually he gets lonely very easily. - 彼らには肩肘張ったところがない
They behave quite naturally.