low road

low-road的词性：
n.（名词）

1. Behavior or practice that is deceitful or immoral:
欺骗：欺骗性的或不道德的行为举止：

He spent much of the campaign on the low road, making scurrilous and unsubstantiated remarks about the incumbent's past.
他的大部分竞选活动都是欺骗下流行为，对在职总统的过去说下流而且没有证据的话。