near the knuckle
言辞、笑话或幽默在道德或社会标准边缘或逾越其范围
口语·形容笑话或言论接近冒犯
英文释义
to be close to being offensive or crossing a social boundary
例句
That joke was a bit near the knuckle; I wouldn't tell it at a formal dinner.
典故来源
源自19世纪拳击术语，指拳头靠近指关节处，比喻言辞接近冒犯的边界。