Monday morning quarterback? What's it?

Meaning in English: Someone who criticizes or suggests alternative actions after something has already happened.T

raditional Chinese: 事後諸葛；馬後炮

Simplified Chinese: 事后诸葛；马后炮

Examples:

• Don’t be a Monday morning quarterback—you weren’t there when we had to make the decision.

• He always plays Monday morning quarterback after every sports game.