Refers to a drink often consumed by gangster folk in an urban setting. This drink is primarily a mixture of promethazine and any other liquid substance used to dillute. Styrofoam cups are mainly used to drink this mixture. Also known as sippin on lean, leanin, sippin on sizzurp.
"Hey bro, where you gonna be kickin it later?" - "Not sure pimp, but we gonna be styrofoam cuppin it ya dig."
by EdUb02 October 20, 2011