Cách sử dụng
The expression "watch your mouth/tongue" is used to tell someone to be careful about what they say. It's often said in situations where someone is speaking in a rude or disrespectful way. For example, if a child is talking back to their parents, the parents might say "watch your mouth" to let the child know that they need to speak to them with more respect. It can also be used in a more lighthearted way among friends or family members who are joking around and teasing each other but want to make sure they don't cross a line and say something hurtful.