砸牌子

砸牌子:

Literally means:

break the signboard of shop; ruin the reputation or credit

Actually means:

牌子 refers to the signboard of an enterprise, or the brand name or trademark of product. Its connotative meaning is reputation.

The whole phrase figuratively means damaging or ruining the public image or credit of person, a certain product, an organization or an enterprise. Derogatory.

牌子，企业的字号、招牌，或产品的专用名称或商标等；转指信誉或名声。

比喻损害、毁坏企业、商品，或单位、个人的信誉或名声。具有贬义色彩。