talk trash
US /tɔk træʃ/
UK /tɔk træʃ/
1.
parler mal, provoquer, se vanter
to speak badly or insultingly about someone or something, often in a boastful or provocative way
:
•
He always talks trash about his opponents before a game.
Il parle toujours mal de ses adversaires avant un match.
•
Don't talk trash if you can't back it up with your actions.
Ne parle pas mal si tu ne peux pas le prouver par tes actions.