Watch her mouth - Idioms by The Free Dictionary
watch (one's) mouth (redirected from watch her mouth)
watch (one's) mouth
To be very mindful or cautious about what one says; to control what one says in order to avoid offensive language. Watch your mouth! I don't care how you speak at home, that's not how we talk here. After being threatened with detention for my snide remarks in class, I knew I had to watch my mouth for the rest of the semester.
watch your ˈmouth/ˈtongue be careful what you say in order not to offend somebody or make them angry: Now, you just watch your mouth around your grandparents, Billy! OPPOSITE: shoot your mouth off (about something)
References in periodicals archive
Surely for your sake she can watch her mouth
for a few hours?
I would watch her mouth
moving, desperately trying to make sense of the words but because I am deaf and couldn't lip-read everything, I would daydream and make up my own stories.