Cough Syrup: Promethazine with Codeine. A pharmaceutical and recreational drug also referred to by a variety of street names, such as sizzurp, purple stuff, drank, lean, and tussin. The street names may or may not refer to the straight cough syrup or the mixture of the syrup and soda, most commonly Sprite.
"No we don't run for the Olympics, but the flame wit us
We got that tussin, that scummy, and that Angle Dust"
--Lil' Wayne, "Stilettos," Dedication: Gangsta Grillz