嘴里不干不净 meaning in Chinese

be foul mouthed

They lost their tempers easily and called one another names , while oaths and obscene allusions were frequent on their lips
他们动不动就发脾气，扣帽子，嘴里不干不净地骂脏话。
The rat , with a snort of contempt , swung round to go , tripped over a hat - box , and fell , with undignified remarks
河鼠轻蔑地哼了一声，转身要走，不想蹴到一只帽盒，摔倒了，嘴里不干不净地骂了几句。