'Zhòng kǒu shuò jīn' is a classical Chinese idiom literally meaning 'many mouths can melt metal.' It vividly illustrates how overwhelming public opinion—or especially persistent, collective rumors—can erode truth, damage reputations, or break down even the strongest person’s credibility, just as intense heat could theoretically melt metal. The four characters work together symbolically: 众 (zhòng) means 'many' or 'the masses'; 口 (kǒu) means 'mouth,' representing speech or voices; 铄 (shuò) means 'to melt' or 'to weaken through sustained influence'; and 金 (jīn) means 'metal,' standing for something solid, unyielding, or valuable—like integrity or reputation.

This idiom is used primarily in formal writing, news commentary, historical narratives, or moral discussions to warn against the destructive power of unchecked gossip, mass hysteria, or viral misinformation. It carries a strong cautionary tone and often implies that truth may be buried beneath noise—not because it’s false, but because it’s drowned out by volume and repetition.