"Ginga: Nagareboshi Gin" character list - see related link below .
Shaithan, pishaj
There aren't slang terms for people's names.
Saying names in the back slang requires no strict rules.
Some common slang names for acid are LSD, Lucy, tabs, and doses.
Speed IS a slang name. It means amphetamines. Click the related question to find more slang.
Poppers
"magic"
There is alot of slang/street names for Hallucinogens like power powder, magic dust, and many more
It's not really slang, but that muscle is commonly called the calf of the leg.
Slang names for a lawyer include hired gun, ambulance chaser, and shyster.
Anal-Attraction