不脛而走 [－胫－－]

Jyutping bat1 hing5 ji4 zau2
Pinyin bù jìng ér zǒu

Definitions (粵典–words.hk)
  1. 語句
    指​消息​、​流言​「​冇​腳​都​識​走​」​，​冇​特別​宣揚​都​好​快​傳開​晒
    (of news and rumours) to get around/about or to spread like wildfire even without hyping up the news; literally, to walk without feet
    • 就算我哋做好晒保密工作，消息都係不脛而走。
      就算我哋做好晒保密工作，消息都系不胫而走。
      zau6 syun3 ngo5 dei6 zou6 hou2 saai3 bou2 mat6 gung1 zok3, siu1 sik1 dou1 hai6 bat1 hing5 ji4 zau2.
      Even though we kept everything confidential, the news still leaked and spread everywhere.

不脛而走 [－胫－－]

Jyutping bat1 ging3 ji4 zau2
Pinyin bù jìng ér zǒu

Definitions (CC-CEDICT)
  1. to get round fast
  2. to spread like wildfire
Definitions (粵典–words.hk)
  1. 語句
    指​消息​、​流言​「​冇​腳​都​識​走​」​，​冇​特別​宣揚​都​好​快​傳開​晒
    (of news and rumours) to get around/about or to spread like wildfire even without hyping up the news; literally, to walk without feet
    • 就算我哋做好晒保密工作，消息都係不脛而走。
      就算我哋做好晒保密工作，消息都系不胫而走。
      zau6 syun3 ngo5 dei6 zou6 hou2 saai3 bou2 mat6 gung1 zok3, siu1 sik1 dou1 hai6 bat1 hing5 ji4 zau2.
      Even though we kept everything confidential, the news still leaked and spread everywhere.
Definitions (Wiktionary)
  1. phrase, idiomatic
    to get round fast; to spread like wildfire
Examples (粵典–words.hk)
  1. Cantonese
    就算我哋做好晒保密工作，消息都系不胫而走。
    就算我哋做好晒保密工作，消息都係不脛而走。
    zau6 syun3 ngo5 dei6 zou6 hou2 saai3 bou2 mat6 gung1 zok3, siu1 sik1 dou1 hai6 bat1 hing5 ji4 zau2.
    • Even though we kept everything confidential, the news still leaked and spread everywhere.