Monday-morning quarterback.
A: If I were him, I would have... (如果我是他,那我就会...)
B: You Monday-morning quarterback. (切,你这个马后炮。)
brown-nose/ass-kissing
He is such an ass-kisser.(他真是个不折不扣的马屁精)
Who can tell me why the brown-nosing employee got promoted!
谁能告诉我,为什么那个马屁精竟然升了!