close to the bone

Từ điển Oxford Advanced Learner 8th

close to the ˈbone idiom
(BrE, informal) (of a remark, joke, story, etc.)so honest or clearly expressed that it is likely to cause offence to some people
•His comments about her size were a bit close to the bone.
•Some of the sex scenes in the play were judged by critics to be too close to the bone.
Main entry: ↑bone_idiom