watching one's mouth

Verb

watch one's mouth (third-person singular simple present watches one's mouth, present participle watching one's mouth, simple past and past participle watched one's mouth)

1. (derogatory, idiomatic) To be careful about one's speech, especially with regard to disrespectful or profane language.
   • You really need to watch your mouth. You're a teacher now!

   Synonyms:

   watch one's language, watch one's tongue

2. (derogatory, idiomatic) In the imperative form, used as a warning to choose one's words carefully or else be silent, for fear of consequences.
   • Hey. Watch your mouth. Don't you realize who's listening?

   Synonyms:

   language