Gnarly

This is always upsetting.

Same for rewatching iasip. I think they're late 20s when it started.

It's dialectic -- there's lot's of them in the US, but this one afk belongs to Black American English, and is shortened from "fixin' to." Personally, I think it's cool to see so many variations of English. The language is definitely not static; it is changing all the time!

"finna" has been around since the 90s, I just listened to a tupac song where they were saying that

Which, um.. which ones are we not supposed to be saying anymore..? Asking for a friend...

It's from a meme, "Money printer go brrrr" ~~which was I think a spin off of the "It prints money!" meme for the original Wii~~ (Edit: did some research and I think they're unrelated.) Its the sound of the machine, printing money, it go brrr.

I've seen it used for all kinds of things, but "go brrr" is basically a dismissive way of talking about how "winning" something is.

Edit: I think Picard Manuever explains it better actually, and while I don't think my usage note is untrue from how I've seen the meme used in evolutions, I'd have to agree that it originally and usually takes the form they described.

It's just the sound of some machine running, but the meme is usually something along the lines of:

"You can't do X, you have to do Y!"

"X goes brrrr"

The humor is in stubbornly doing something in a dumb way.