扔掉: throw something away
I threw my old iPhone away because I'm getting an iPhone X.
我把旧手机扔了，因为我要买一个iPhone X.

你能帮我把这个扔了吗？
Can you dump this for me?
Can you throw this away for me?
Can you get rid it for me ?

Tie something up 把某物捆紧
Tie up the books so we can sell them altogether.
把这些书捆起来，我们可以一起卖了。

顺便去某某地方:
Drop by a place
Stop by a place
Swing by a place

我也这么想：
I thought the same thing.
That's what I was thinking too.
That makes two of us.