Not just any cough syrup, but PROMYTHAZINE cough syrup. Usually mixed with sprite, but has been known to be mixed with other sodas, mostly fruity ones such as fanta. Has a slightly grapey taste to it and is purple. Most people get addicted to this not just for the drowsiness affect that it gives, but because of its taste.
by Mike Do September 20, 2005
Get the leanmug. 
by x August 11, 2003
Get the Leanmug. Lean is a mixed drink originating in the Southern Rap culture. It is a mixture of Promethazine and Codeine cough syrup and a soft drink such as Sprite (usually). While other soft drinks may be used, Sprite was the original.
There are some variations of Lean. For example, Promethazine and Codeine syrup is usually Purple in color. But there are other colors of syrup that work the same way. There is a golden colored syrup (hydrocodone based) and other colors as well.
Lean slows you down. It makes you feel good. It's meant to be sipped on, and it taste damn good. One of the best feelings you will ever experience. Euphoria with a hint of sedation.
There are some variations of Lean. For example, Promethazine and Codeine syrup is usually Purple in color. But there are other colors of syrup that work the same way. There is a golden colored syrup (hydrocodone based) and other colors as well.
Lean slows you down. It makes you feel good. It's meant to be sipped on, and it taste damn good. One of the best feelings you will ever experience. Euphoria with a hint of sedation.
Chris: Yo man want to go to a party tonight, I heard they got kegs there?
John: I can't man.
Chris: Why not?
John: I'm sipping on that lean already bro. Don't need that alcohol.
Chris: Fuck that, gimme some!
John: I can't man.
Chris: Why not?
John: I'm sipping on that lean already bro. Don't need that alcohol.
Chris: Fuck that, gimme some!
by 813indisbihh November 11, 2009
Get the Leanmug. by ABNNIGGA September 28, 2008
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Get the lean on mug. by Gen-tailia June 16, 2011
Get the LEANmug.