not touch somebody with a bargepole

Từ điển Oxford Advanced Learner 8th

not touch sb/sth with a ˈbargepole idiom
(BrE) (NAmE not touch sb/sth with a ten-foot ˈpole) (informal)to refuse to get involved with sb/sth or in a particular situation
•Personally, I wouldn't touch him or his business with a bargepole.
Main entry: ↑touch_idiom