near the knuckle

US /nɪr ðə ˈnʌkəl/
UK /nɪr ðə ˈnʌkəl/
"near the knuckle" picture
1.

過火, 不雅, 粗俗

almost offensive or rude, especially because of being sexual or involving rude humor

:
His jokes were a bit near the knuckle for the family gathering.
他的笑話對家庭聚會來說有點過火了。
The comedian's routine was quite near the knuckle, but the audience loved it.
這位喜劇演員的表演相當過火,但觀眾很喜歡。