What does "pounce on chickens" mean? (Cantonese)

The Cantonese proverb "Pujie" has multiple meanings, such as unlucky meaning, and can also be translated as illegitimate child. It is used to swear and laugh at yourself.

Example:

1: you servant street = you bastard

Why don't you die when so many people are dead?

3. This is really a servant street = this is really unlucky.