When taken at a musical festival or concert, we always asked if anyone wanted to “Go Dancing With Lucy” for the evening.
Molly is slang for Ecstasy.
I guess you could snort some (or a lot) off of someone’s bare ass, especially if you know the Kardashian girls.
A “lid” referred to a baggie (couple fingers) of pot (which could be had in my day for about 10-20 bucks). Ragweed was low quality pot.
Snow was cocaine.
Like grandpa Simpson up there, this was in the coughcough70sahem. 
From a TV news story about a police operation targeting drug users advertising on Craigslist (“Snow Bunny wanted for weekend encounter”) I learned that “Tina” is a popular slang for crystal meth.
In the 70’s pot was “bud”, “smoke”, “weed” or sometimes “bo” referring to Colombian - consume it in the popular manner and you were “smokin’ dope”. I’ve never heard anybody call it “Mary Jane” either.
For reasons I don’t understand heroin is called “blow”.
It isn’t.
MDMA (Ecstasy) = X or XTC. I’ve heard Ravers, Candy or Vitamin E too, but there’s a metric ton of slang for these things.
Any opiate in pill form = Happy pills.
Purple Drank / Sizzurp = cough syrup (codeine and promethazine), mountain dew, and jolly rancher candies.
Although there are loads of names for Ecstasy, in my younger days the most popular form of E was Mitsubishis, or 'Bishis. Before that Doves were the most iconic “brand”.
Liquid Spasma = meth powdered into a slurpee
a gorgon = inhaling nitrites sprayed onto braided hair
smollycarb = injecting mescaline solution into the urethra
My favorite: goofballs for barbituates.
“These damn kids today are all hopped up on goofballs!”
I love some of the fanciful names for the various varietals of marijuana. “Bolivian Mellow Master”, “Nanaimo Dreamleaf”, “Huntington Ditchweed”, “Johannesburg Flying Carpet Ride Ticket”, etc.
Don’t forget “Matanuska Thunderfuck”
Ones that I’m familiar with:
Clarky-Cat
Triple-sod
Yellow Bentines
Cake (which is a metabolically bisturbile drug, some of you may be familiar with it) has a rich history of nicknames itself including:
loonytoad quack
Joss Ackland’s spunky backpack
ponce on the heath
rustledust
Hattie Jacques pretentious cheese wog
more info here, but language is NSFW
Terms for marijuana:
Mary Jane, ganja, buddha, leaf, mj, wacky tobaccy, “tobacco” (hush hush), bud, hemp, weed, grass
Cigarettes: smokes, cancer sticks, lung darts, lung candy
piskatchatoon - fermented beaver juice
mandowee - red velvet marijuana cupcake
clanch - Quaalude chased with a diuretic
MJ, kind, dank, herb,elf lettuce, nugs, supakind, grass, reefer
Meth: ice, crystal, crank, candy
Coke, blow, nose candy, Bolivian matching powder, lines, rails, snow
Shrooms, boomers, fungus, bluestems
Ah, thank you.
"That’s that shit!"-Heroin, again.
Urban Dictionary: thats that shit (for doubters)
Heroin: Garbage
Pot: Hoop
Cocaine: Bump
Yes it is.
MetaFilter
No Slang.com Drug Slang Translator
It appears to be regional slang (Detroit & Chicago). The links refer to “blows”, but when I was a cab driver (on the overnight shift) in Detroit I only heard people call it “blow”.
Funny story about that. When we were kids we called it that ironically, because it was the purest crappy ragweed. (Was raised in Anchorage, spent 40years in AK, up until the end of 2010)
Apparently that’s no longer true. I don’t know, having been out of the loop for several decades, but I guess it’s now got some of the highest THC content in the world.