I personally don't use that. I think it is usually used on television in silly shows. It's not used very often in every day conversation, as far as I know.

We say "jel" in Newcastle.

"Are you jel?"

I'd only say it as a joke though.
People also ask, "what's the gen?" which I assume means "general news".

Yes it does mean jealous, but people use it as a rhyme. It is proper to use with your friends, as of trying to make a joke. Lol

yes it belong to the word jealous

Right it means Jealous , but people use it for fun, or as a joke with friends ..