beneath one's dignity
1. 有失身份
Is it beneath your dignity to go to the theater with such a poor fellow?
与这样一个穷家伙一起去看戏有失你的身份吗?
stand on/upon one's dignity
1. 坚决受到应有的礼遇; 保持尊严
He is a man of small moral stature who always tries to stand on his dignity.
他是个偏狭小人, 老是计较体面。