it won't/wouldn't kill somebody (to do something)spoken used to say that someone could easily do something, and ought to do it (做某事)又不会要了某人的命〔因此应该去做〕 It wouldn’t kill you to help out once in a while. 偶尔帮别人一把又不会要了你的命。
it won’t/wouldn’t kill somebody (to do something)• It wouldn't kill you to do the dishes.
→ it won’t/wouldn’t kill somebody (to do something) at kill1(6)