Dark

Originally meaning moody/scary/bad scene

Now also the inverse

In Drum and Bass (or Jungle) music parlance fast beats and minor chords.

That tune was dark, I first heard on these snidey E's and it was like, bad Dark, but it is proper DARKcore.

pony

cockney money slang 25 pounds sterling
cockney rhyming slang 'pony and trap' - crap.

I bought this for a pony but it was pony