gwaan1 nei5 pei3 si6關你屁事关你屁事

Jyutpinggwaan1 nei5 pei3 si6
Yalegwāan néih pei sih

Definition

None of your business; mind your own damn business.

slangslangemotion

How it's used

This phrase is highly aggressive and carries a strong sense of hostility, functioning as a blunt way to shut down someone who is being overly inquisitive or intrusive. It is significantly more offensive than the standard 關你咩事, as the inclusion of 屁 adds a vulgar, dismissive tone that signals you have zero patience for the other person. Use this only when you are genuinely angry or want to signal the end of a relationship, as it is rarely used in friendly banter.

Examples

Whatever I do, why is it any of your business?
This is my private business, none of your damn concern.

Common phrases

None of your damn business!

Common mistake

Learners often mistake this for a standard way to say mind your own business, but it is actually quite rude and can easily escalate a conflict. Avoid using this with strangers, elders, or in any professional setting unless you intend to be confrontational.

Grammar color guide

Noun
Verb
Adjective
Adverb
Pronoun
Classifier
Particle
Connector