Here are some real weird code names that I've heard people say before:
Weed = Chank, Doob, Scoop, Booger.
LSD = Limited Slip Differential
Acid = Nitric, Cleaner, Batteries
Ecstasy = Easys, enhancers
Coke = Cola, flour, asbestos
Drugs in general: Bonus points, Arsenal, Rip formula.