mouth off &I{【俚語】}

To express one's opinions or complaints in a loud, indiscreet manner.

回嘴：不禮貌地說；回嘴

a mouth to feed

a person, typically a child, who has to be looked after and fed

（尤指孩童）需要贍養(yǎng)的人

be all mouth (and no trousers)

(informal)tend to talk boastfully without any intention of acting on one's words

(非正式)只說不作；干打雷不下雨

give mouth

(of a dog) bark; bay

（狗）吠

keep one's mouth shut

(informal)not say anything, especially not reveal a secret

(非正式)守口如瓶

would he keep his mouth shut under interrogation?.

審訊時他會守口如瓶嗎？。

open one's mouth

(informal)say something

(非正式)開口說話

sorry, I'll never open my mouth about you again.

對不起，以后我再也不說有關你的話了。

watch one's mouth

(informal)be careful about what one says

(非正式)說話注意

mouth off

(informal)talk in an unpleasantly loud and boastful or opinionated way

(非正式)自吹自擂毫無顧忌地高聲談論；固執(zhí)己見地高談闊論

he was mouthing off about society in general.

他正就整個社會高談闊論。