What means chicken poultry?

"Chicken poultry" is a redundant phrase.

Chicken is already a type of poultry.

* Poultry refers to domesticated birds raised for meat or eggs.

* Chicken is a specific type of poultry, along with turkeys, ducks, geese, and others.

So, when someone says "chicken poultry," they're simply emphasizing that chickens are birds raised for food.