I heard my coworker, a native English Speaker, next to me talking on the phone. She said "you should learn to moderate your mouth when you are talking, you just talk anyhow to me about being a liar...." I knew she is a habitual liar by working with her. Since we are at our company, she can't really talk loud. She was quite upset on the phone.
From the words she used in the sentence,
'you should learn to moderate your mouth,' did it sound like she was
yelling or being impolite/aggressive/disrespectful to the person on the phone? In addition, can someone tell me how strong the word, moderate, is used here?