2. Here in my part of L.A., D can also stand for dope, which either means heroin or crystal meth...but here in meth capital of the county, Glendora, it usually is associated with ice.
2.Yo man, you on D with some D? (here meaning tweak)
P.S. Anyone who refers to marijuana as dope is either a complete moron, or grew up in the 50's and 60's.