1 definition by Fat Chicken
A sibling or parent that just simply eats to much, even though they don't gain any weight. If you ever have a older brother that looks like a twig, let them know they are a fat chicken!!
You: Kyle, stop eating all the food!! You are such a fat chicken!!
Kyle: I am a twig, what are you talking about?!
Kyle: I am a twig, what are you talking about?!
by Fat Chicken October 10, 2020