informal Be careful about what one says: you’d better watch your mouth, mate, or we’ll have you
More example sentences
- In the locker-room, too, he will have to watch his mouth.
- After warning him to watch his mouth once again he walked off with his dogs.
- I know damn well what I'm saying, and no way in hell am I watching my mouth.
Definition of watch one's mouth in:
- The US English dictionary