If you hear or see the last of something or someone unpleasant or difficult, that person or thing does not cause you trouble again.

I paid them $100 for the damage and I hope that's the last I'll hear of it. 我赔了他们100美元，希望从此能彻底了断这个事情。

You haven't heard the last of this! - I'll see you in court. 你的这件事还没完！——咱们法庭上见。

He's horrible - I really hope we've seen the last of him. 他太讨人厌了——我真的希望我们从此能不再和他打交道了。