不胫而走，汉语成语，字面意思是没有腿却能跑（run without legs），多指消息无声地散播。可以翻译为“get around fast或spread quickly like wildfire”。

例句：

谣言不胫而走，说他曾包庇走私。

The rumor somehow went about that he used to shield smuggling.

这则趣闻不胫而走。

The amusing news travels fast.