I always have been a saver, so I never thought about anyone being cheap. I know a homeless guy, living in his van. I think he has a great life and kind of envy him.
I just recently discovered that people think I'm cheap.
Most of my friends and I graduated last year, so there has been a huge income jump for everyone. Now I suddenly have to defend myself because I'm not buying a new smartphone just because mine is two years old and the OS is not top notch.
I even got the question what the hell I'm saving for. I told some of the money smarter ones that I want to retire, they think I'm crazy. I useally tell everyone else, that I want to buy a house some day, which results in "Dah just finance"...
So no my definition has not evolved, but everyone elses has!