mouth off

US /maʊθ ɔf/
UK /maʊθ ɔf/
"mouth off" picture
1.

頂嘴, 出言不遜

to speak in an insolent or disrespectful way, especially to someone in authority

:
He got fired for mouthing off to his boss.
他因為頂撞老闆而被解雇了。
Don't mouth off to your elders.
不要頂撞你的長輩。