If you don’t know, Lean or Purple Drank is a recreational drug, a concoction made by mixing cough syrup containing Codeine and Promethazine with Sprite (and sometimes a hard boiled sweet such as a Jolly Rancher for some extra sweetness).
The side effects of Lean include dizziness, blurred vision, nausea, and memory problems.
Because of the Codeine content, another side effect of consuming Lean is constipation. Maybe that’s why if you’re “sippin’ sizzurp” in a Styrofoam cup in 2017, you’re stuck doing old shit.