British, informal
if a joke or a remark is near the knuckle, it is about sex in a way that some people find offensive.
Some of his jokes were a bit near the knuckle and, unfortunately, I was watching the show with my parents.
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。