A shady, underworld organization started by American military members in Europe. So named for the possibility of ending up in Mannheim, the main military prison in Germany, run by the US Army.
Don't fuck with that guy, I hear he is Mannheim Mafia
The instrumental development in a song or piece of music. Most commonly at the start, instruments will slowly be introduced the more the song/piece goes on.
First pioneered by the composers of the Mannheim orchestra some time in the late 19th century the musical discovery has been used a lot in pop, rock, classical and other music genres.
"The song starts with a Mannheim development and then gets into the mainmelody."