That’s a version of decadence, and I got what you meant originally, but most speakers in the north (well, United States, Wales, and Toronto, Ontario as those are who I talk to most) think more of the excessive indulgence stemming from moral decline.

“Oh that chocolate was so decadent” meaning “I feel like I slipped into gluttony and sin eating it it was so good”.

It’s kind of used as a mix between the two definitions depending on the context. It’s so interesting how language changes from place to place.

The Brazilian Nazis. Many of the ones who didn’t end up in Argentina ended up in Brazil with just as many stolen goods. (They say, I haven’t studied Nazi flight patterns)

I dunno, my friend from Brazil says the Brazilian ones are just as bad.