A skinny person has a slender or thin body shape.
When we talk about someone being skinny, we usually mean that they don't have much fat on their bones. It's not always a good thing to be described as skinny - sometimes it can sound like you're hungry or even unhealthy. But in other cases, people might choose to stay skinny because of sports or fashion reasons. You might also hear someone say "I'm feeling pretty skinny today" if they've just lost some weight after exercising a lot.
(informal) Thin, generally in a negative sense (as opposed to slim, which is thin in a positive sense).
Example: Her recent weight loss has made her look rather skinny than slender
