一刀两断的英文：
[Literal Meaning]
one/knife/two/break
to cut in two with one stroke of the knife

[解释]
一刀斩为两段。比喻坚决断绝关系。

[Explanation]
to severe at one blow;to make a clean break

[例子]
知道韩亮又开始吸毒，小丽决心和他一刀两断。

[Example]
Knowing that Han Liang used drug again, Xiao Li decided to make a thorough break with him.

She decided to finish with him for good.
她决定和他一刀两断。

George was determined to break off with those racists.
乔治决心和那些种族主义者一刀两断。

If you behave like that in front of my friends again, I'll disown you!
你要是当着我朋友的面再那样做，我就和你一刀两断！

If you behave like that in front of my friends again,I'll disown you!
你要是当着我朋友的面再那样做,我就和你一刀两断!