dash away 飞快的离开，快走；

I'm already late for the meeting, I must dash away now.

开会已经迟到了，我得赶紧走了。

haul ass

这个词组是美国俚语，用作动词，意思是动身，立即行动。

We'd better haul ass, it's a long way to go.

我们最好赶快动身，还有好长的路要走呢。