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。