smart-mouthed       
adjective US informal uk/ˌsmɑːtˈmaʊðd/ us/ˌsmɑːrtˈmaʊðd/
 说话放肆的;能言善辩的;口齿伶俐的
(of a way of speaking) showing little respect
  a smart-mouthed little brat 一个口齿伶俐的小屁孩 
 She is working-classblue-collar, smart-mouthed, and mischievous. 她是工薪阶层的蓝领,口无遮拦又淘气。 
 See: smart mouth
 - More examples
 - Smart-mouthed kids are quick to remind teachers that their parents can sue them.
 - A smart-mouthed teenager is sentenced to prison in this witty serial.
 - I like smart-mouthed women who fight with the men they love.