"mouth off" in Chinese (Simplified)
顶嘴乱说话出口无状
Definition
以粗鲁、不尊重的方式说话，常常抱怨或批评，尤其是对权威人士。
Usage Notes (Chinese (Simplified))
属于非正式用语，语气有些无礼。常指对权威人物（如家长或老师）顶嘴或不尊重。可与‘tǐng zuǐ’等词互换。避免在正式场合使用。
Examples
Don't mouth off to your teacher.
不要对你的老师**顶嘴**。
He got in trouble for mouthing off in class.
他因为在课堂上**乱说话**而惹上麻烦。
Kids should learn not to mouth off at their parents.
孩子们应该学会不要对父母**顶嘴**。
Why are you always mouthing off when someone gives you advice?
别人给你建议时，你为什么总是**顶嘴**？
You shouldn't mouth off at your boss if you want to keep your job.
如果你想保住工作，就不该对老板**顶嘴**。
He got suspended for mouthing off at the coach during the game.
他因为在比赛时对教练**顶嘴**被禁赛了。