hai6 jan4 dou1 zi1係人都知系人都知

Jyutpinghai6 jan4 dou1 zi1

Yalehaih yàhn dōu jī

Definition

Everybody knows; common knowledge.

colloquialpeoplecommunication

How it's used

This phrase functions as an idiomatic way to emphasize that information is common knowledge or an open secret. It carries a slightly informal, assertive tone that implies the listener should already be aware of the fact. It is frequently used to dismiss someone for stating the obvious or to highlight the absurdity of keeping a secret that is already public.

Examples

le1呢gin2件si6事hai6係jan4人dou1都zi1知laa1啦，m4唔sai2使zoi3再gong2講。

Everyone knows about this, no need to talk about it anymore.

keoi5佢zung1鍾ji3意nei5你，hai6係jan4人dou1都zi1知㗎gaa2喇，laa1仲zung6扮？

Everyone knows he likes you, why are you still pretending?

Common phrases

hai6係jan4人dou1都zi1知ge3嘅bei3秘mat6密

an open secret

Common mistake

Learners often try to translate it literally as a subject, but it is actually a fixed expression that acts as a predicate or a comment on a situation. It cannot be used as a noun phrase like "everybody" in English; it must be used to describe a state of affairs that is widely known.