传六耳

Traditional (Taiwan): 傳六耳

chuánliù'ěr ㄔㄨㄢˊ ㄌㄧㄡˋ ㄦˇ

    • for a secret to reach a third person
    • to leak a secret

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
pass to six ears
Meaning
For a secret to reach a third person, since a private talk between two people has only four ears. Used when a secret leaks.

Sources