You should watch your mouth when you talk to your teacher.
watch one's mouth
idiomTo be careful about what one says, especially with regard to disrespectful or profane language.
The manager warned the employee to watch his mouth after he used rude language during the meeting.
In the presence of the stern headmaster, the students learned quickly that they needed to watch their mouths if they wished to avoid detention.
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abound in one's own sense
To follow one’s own inclinations and opinions.
- 02
ace up one's sleeve
A surprise advantage of which others are not aware.
- 03
act one's age
To behave in a manner appropriate to one's age.
- 04
act one's age, not one's shoe size
Synonym of act one's age (“to behave in a mature manner; to avoid being childish”).
- 05
afraid of one's own shadow
Exceptionally timid.
- 06
air one's dirty laundry in public
To reveal one's sordid secrets to the public.
- 07
air one's dirty linen in public
Synonym of air one's dirty laundry in public.
- 08
albatross around one's neck
A characteristic, possession, associate, or previous deed that hinders one's ability to succeed.
Last updated July 12, 2026