im in Melbourne, Australia and heres our drug slang (where im from anyway)
ECSTASY: bickies (most common by far), pills, pingers, flippers (not as common)
MARIJUANA: choof (most common), weed, jozz
SPEED: louie, speed, whipper
COCAINE: coke, charlie
GHB/GBL/1,4-B: juice (most common), charge, G
METHAMPHETAMINE: shards, ice