封嘴 fēngzuǐ
(1) [keep silent;say sth. definitive so as to prevent further discussion]∶一言不发或一口咬定
人家已经封嘴了,三百就三百吧
(2) [make sb. keep silent;seal sb.'s lips;gag sb.'s mouth]∶压制言论自由,试图不让人讲话
给钱干吗?想封嘴呀,门儿也没有