What is dancing with Mr Brownstone?

guns n roses slang for doing heroin

...HEROIN SHOOTAGE BIOTCH

"hey, where have you been?"
"slam-dancing with mr. brownstone in the 7/8 bathroom"
"yeeah man! damn, share the goods i need a fix"

dancing with Mr Brownstone - video

Dancing with Mr.Brownstone refers to doing Heroin. There is also a song about this by an American Rock group known as Guns N Roses.

We've been dancing with Mr Brownstone he won't leave me alone drugs heroin guns n roses rock america Dea