ˈbad-mouth BrE AmE verb [transitive] especially American English informal
to criticize someone or something:
Her former colleagues accused her of bad-mouthing them in public.
ˈbad-mouth BrE AmE verb [transitive] especially American English informal
to criticize someone or something:
Her former colleagues accused her of bad-mouthing them in public.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012