smart mouth
noun [ C usually singular ] US informal uk/ˈsmɑːt ˌmaʊθ/ us/ˈsmɑːrt ˌmaʊθ/
爱贫嘴的人，爱耍嘴皮子的人
If someone has or is a smart mouth, they speak to other people in a way that shows little respect.
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。