Is a fat lady really fat?

Depends.

A skinny person might think so

A average person might not

An obese person would know.

There is a difference between obese and fat

Fat is just extra skin that should be burned off and isn't typically fat

Obese is when you are in trouble should lose weight and execerise

When people ask is a fat lady really fat?

The answer is no

fat is just extra skin that makes you a little bigger but not obese

When people ask is a obese lady really fat.

The answer is yes