In Jamaica we would say that you're smoking 'seasoned spliff'
"A ganja (marijuana) spliff peppered with crack cocaine is a "seasoned spliff" joint. The brand has been expanded to include "lizard tail" that adds mystique to the product. The marketers of illicit drugs in Jamaica are proffering embellishments. With deadly earnest, they are marketing their products and building on synergies to seduce a new set of users. Their stealth is evident as many naïve users do not know that cocaine, has been added to that ganja spliff."