Bad-mouth | say unkind, unflattering, embarrassing (and probably untrue) things about someone.
남을 비방하거나 욕하는것
A: "I don't believe what Alex said. Why is he bad-mouthing me?"
B: "He's probably jealous of your success."
IDIOMS by THEME | Level 1 | (39) Bad Mouth
Missy: You know, what Sherri did wasn't very nice. I expected more from the her.
Carl: I agree. You don't go around bad-mouthing someone just because he got a better offer.
Missy: It only shows your weakness.
Carl: Amen to that!
>>번역
Missy: Sherri가 해놓은것은 정말 좋지 않았어.난 그것보다 좀 더 잘하기를 기대했는데.
Carl: 동감이야. 그가 더 좋은 제의를 받았다고 해서 여기저기 돌아다니면서 남의 험담하지는 않을거야.
Missy: 그건 단지 그의 취약점을 보여주기만 할 뿐이야.
Carl: 전적으로 공감해.