Two musical genres not exactly famous for their use of obscure language, but offhand I can think of two words I learned from modern popular music:
- undine
- sericulture
BTW anyone who can name both songs wins an SMDB spam-free cookie!
Pompadous
Suissuidio
CURSE YOU!!! I wanted to say that!!!
I never heard the word copacetic until the Local H song Bound for the Floor.
I’d never heard the word haver (talk foolishly; babble) until The Proclaimers’ 500 Miles.
Copacetic (Local H)
Lucidity (Queensryche)
Zigazigha
Debenture
A number of anglicisms: bedsit, wimpy bars, hire purchase.
breezeblocks (Alt-J)
pataphysical
Acquiesce
Conciliatory
Tao
Grandeur
And a phrase…
“sexual tension.”
Wasn’t until I was older that I learned what that meant.
Sericulture is from the Human League’s “Being Boiled” - I’ll let the person who knows the other one have the cookie.
Brucellosis
“Play It All Night Long”-Warren Zevon
Pugnacious
Lugubrious
“The Original Wrapper”-Lou Reed
At 17.
Maxwell’s Silver Hammer.
I am not sure if this is meant to be a game, but I thought I’d give it a shot.
Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwhenuakitanatahu.
Orgasmatron.
When i was a young boy, Warrant taught me that “Cherry pie” was not, in fact, a baked good. 
Scaramouch
Bismillah