ㄔㄨㄢˊchuánˊshíˊshíㄔㄨㄢˊchuánㄅㄞˇbǎi

  1. 形容消息輾轉相傳散布·第一》:自從姑娘人人彩鳳隨鴉不免紛紛議論一傳十,十傳百一班黨人。」

news pass quickly from mouth to mouth (idiom)​, an infectious disease spreads quickly (old meaning)​