a nasty one

(informal)an awkward question or task

(非正式)棘手的問題（或任務(wù)）

a nasty piece (或 bit) of work

(informal)an unpleasant or untrustworthy person

(非正式)令人不快的人；不值得信賴的人

a nasty taste in the mouth

something nasty in the woodshed