ˈbad-mouth verb [transitiveT] especially American EnglishAmE informal CRITICIZEto criticize someone or something 说…的坏话,谩骂,批评 Her former colleagues accused her of bad-mouthing them in public. 她以前的同事指责她在公开场合说他们的坏话。
bad-mouth• Divorced parents shouldn't bad-mouth each other in front of the kids.