Correct usage:
* As a request: "Can I have a little more chicken, please?"
* To describe a quantity: "I'd like to add a little more chicken to the salad."
Incorrect usage:
* Without context: "A little more chicken" on its own doesn't make sense. It needs to be part of a larger sentence or phrase.
Alternative phrasing:
* "Some more chicken" is a more common and natural way to express the same idea.
* "A little more" can also be used without specifying the item, but it's less specific.
Overall: "A little more chicken" is grammatically correct, but it's important to use it within a context that makes sense.