below the belt

US /bɪˈloʊ ðə bɛlt/
UK /bɪˈloʊ ðə bɛlt/
"below the belt" picture
1.

卑鄙的, 不公平的, 人身攻擊的

unfair or cruel, especially in a way that is too personal

:
His comment about her past was really below the belt.
他對她過去的評論真是卑鄙
That joke was a bit below the belt, don't you think?
那個笑話有點卑鄙,你不覺得嗎?