"Purple drank is a slang term for a recreational drug popular in the hip hop community in the southern United States, originating in Houston, Texas. Its main ingredient is prescription-strength cough syrup containing codeine and promethazine. Cough syrup is typically mixed with ingredients such as Sprite soft drink or Mountain Dew and pieces of Jolly Rancher candy. The purplish hue of purple drank comes from dyes in the cough syrup. There are numerous slang terms for purple drank, including sizzurp, lean, syrup, drank, barre, purple jelly, and Texas tea. In June 2000, Three 6 Mafia's single "Sippin' on Some Syrup," featuring UGK, brought the term "purple drank" to a nationwide audience. Three 6 Mafia's single "Rainbow Colors" featuring Lil' Flip pertains to the consumption of purple drank; the addition of a Jolly Rancher candy to a cup of purple drank creates a spectrum of colors, hence the name."
When Martin was referring to "drank" and "lean" and "DMX" in his Facebook postings, this is what he was referring to.
