mouth off
US /maʊθ ɔf/
UK /maʊθ ɔf/

1.
bercakap biadap, berkata kasar
to speak in an insolent or disrespectful way, especially to someone in authority
:
•
He got fired for mouthing off to his boss.
Dia dipecat kerana bercakap biadap kepada bosnya.
•
Don't mouth off to your elders.
Jangan bercakap biadap kepada orang tua.