bad-mouth
verb
ˈbad-ˌmau̇th 
-ˌmau̇t͟h
bad-mouthed; bad-mouthing; bad-mouths
transitive verb
: to criticize severely
Synonyms
- belittle
- cry down
- decry
- denigrate
- deprecate
- depreciate
- derogate
- diminish
- dis [slang]
- diss
- discount
- dismiss
- disparage
- kiss off
- minimize
- play down
- poor-mouth
- put down
- run down
- talk down
- trash
- trash-talk
- vilipend
- write off
See all Synonyms & Antonyms 
Word History
First Known Use
1941, in the meaning defined above
bad-mouth
verb
as in to dismiss
to express scornfully one's low opinion of she promptly bad-mouthed that awful movie to everyone she knew Synonyms & Similar Words
Relevance
- dismiss
- criticize
- disparage
- minimize
- diminish
- denigrate
- belittle
- derogate
- diss
- decry
- denounce
- dislike
- condemn
- trash-talk
- deprecate
- discount
- cry down
- talk down
- depreciate
- scold
- discredit
- dump on
- run down
- trash
- poor-mouth
- play down
- write off
- vilify
- dis
- kiss off
- vilipend
- defame
- slander
- abuse
- put down
- malign
- disgrace
- censure
- discommend
- asperse
- traduce
- reprehend
- rip
- slur
- disapprove (of)
- reprobate
Antonyms & Near Antonyms
- applaud
- praise
- exalt
- glorify
- endorse
- recommend
- laud
- extol
- approve
- favor
- magnify
- sanction
- indorse
- commend
- extoll
- acclaim
- countenance
- compliment
- eulogize