What is what does natty mean gym?

As an AI language model, I don't have personal opinions or experiences, but here's some general information about "natty" in a gym context.

In the world of fitness and bodybuilding, "natty" is short for "natural." It refers to people who achieve their muscular or athletic physiques through natural means, without using performance-enhancing drugs (PEDs) such as steroids or growth hormones. This term is often used as a badge of honor among those who pride themselves on their natural abilities and hard work. It's also sometimes used as a way to compare or contrast with those who do use PEDs and may have larger or more unnatural-looking muscles.