A play or movie that contains musical numbers.
Often broadway shows. Include annoyingly good songs like Oklahoma, which is educational because it teaches us that oklahoma is spelled "O-k-l-a-h-o-m-a" and some other showtunes
I've been in countless musicals. My first one was Oklahoma! Like you care...
A kick ass language that is can make coversation so much more interesting. Mostly spoken by Jews, but I know a lot of yiddish, and I'm a goyem (gentile)
So in short, spoken by Jews, some gentiles, and the entire town of Great Neck.