potty mouth
noun [ C ] informal uk/ˈpɒt.i ˌmaʊθ/ us/ˈpɑː.t̬i ˌmaʊθ/
满口脏话的人
someone who uses a lot of rude language
When did he become such a potty mouth? 你什么时候变成了一个满口脏话的人？
满口脏话
a habit of using a lot of rude language
She can't help it. She has a potty mouth. 她忍不住的。她一向满口脏话。