talk trash
US /tɔk træʃ/
UK /tɔk træʃ/

1.
bicara sampah, menghina, membual
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.
Dia selalu bicara sampah tentang lawannya sebelum pertandingan.
•
Don't talk trash if you can't back it up with your actions.
Jangan bicara sampah jika kamu tidak bisa membuktikannya dengan tindakanmu.