Hip-Hop Lingo. Phrase originated circa 1985. In use from 1985-1987. Most popular usage was in M.C. Shy D's 1986 hit Gotta Be Tough. Generally an expression used within description when someone hears a great song (or encounters greatness through any sort of entertainment medium) and they need to tell somebody about it, usually somebody with clout or power.

I'm considering making it my personal crusade to put this phrase back into popular usage. It's just too fun to say.