below the belt
采取不公平或不道德的手段或攻击方式；超出公平竞争的范围
口语·指不公正或伤人的攻击
英文释义
unfair or unethical; crossing a boundary or attacking someone in a particularly hurtful or personal way
例句
Bringing up his divorce during the argument was really below the belt.
典故来源
源自拳击规则，击打腰带以下部位为犯规，后引申为不公平或卑鄙的手段。