What is jazz music?

Both in terms of music theory and the tone/feel of it.

How do you define jazz?

I partly ask this question because I was fiddling around with recording a deal where I tried to combine jazzy chords and rock elements with a little 2–5-1.

Also called fusion I think it is. I had mixed feedback but one guy blew up about when I called it that and was like thats not jazz at all man, you can’t just do this and call it that and blah blah basically.

Personally I did not know there was so called rules to music and restrictions against experimenting, but eh whatever.

So when do you know it is jazz what makes it jazzy??