have legs 可以表示“有腿”，也常被用来表达“消息不胫而走”，the news has legs 意思就是这条新闻就像有腿一样，不胫而走。

【例句】
This story has legs. Everyone is talking about it.
这个传闻不胫而走，大家都在讨论。

A spider has eight legs.
蜘蛛有八条腿