Did I really just say that?

[TrollHunter]

I randomly said the word gnarly out loud to some friends
I spent the next week wondering where the hell it came from

1993, at a guess.

I was born in 1995, that's where the confusion comes into play.
Never was gnarly a part of my vocabulary.
I think a 90s surfer is possessing my body whenever I let my guard down.