(go and) take a running jump

To go away and leave one alone because what is being done or said is very irritating. Often used as an imperative.

走开，不打扰某人，因为所做或所说的事令人恼火。常用作祈使句

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走开，一边儿歇着去

A: The experiment might work better if you actually knew what you were supposed to be mixing together.

如果你真的知道要混合的是什么，这个实验可以做得更好。

B: You know what, Jenny? Why don't you take a running jump?

这样吧，珍妮，你不如去一边歇会?