口口相傳 [－－－传]

Jyutping hau2 hau2 soeng1 cyun4
Pinyin kǒu kǒu xiàng chuán

Definitions (Wiktionary)
  1. phrase, idiomatic
    to be passed down orally; by word of mouth
    (syn.) 口耳相傳, 口耳相传