She needs to stop running her mouth about other people.
run your mouth
Frequency:
80
%
If you keep running your mouth, you're going to get into trouble.
run your mouth
Frequency:
70
%
It's best to think before you speak and not just let your mouth run.
Idiomatic Expressions for run your mouth
Phrase: running your mouth
Meaning: continuously talking, often without considering the consequences
Usage: She got in trouble for running her mouth about the company's confidential information.