This is Hard Candy Trailer Trash and Square Hue Never Forget:
Hard Candy used to have a bunch of polishes with names like this, in the old days - Trailer Trash, Jailbait, Scam. I've always thought they were pretty funny, and I was sorry when the newer (less hip, more Walmart-friendly) version of Hard Candy got rid of the goofy names.
Meanwhile, more recently, Square Hue walked themselves into the name problem when they did the "Decades" collection in 2015 - the problem of what to do about the 2000s, that is. I suppose that they knew what they were gettng into. (They really were trying for the sublime and the ridiculous, though - it's a three polish set, for the 2000s - the others are Hurricane, presumably for Katrina, and... wait for it... Idol. As in American Idol, yeah. They're all silver/grays, too, so I'll be probably talking about the other two of these really shortly.) Honestly, I think doing a 9/11-themed polish was a mistake. Giant tragedies and nail polish just really shouldn't intersect, in my opinion - that pretty much goes for both Never Forget and Hurricane. Your mileage may vary, of course. (I'll just refer back to this entry when I get to Hurricane in a in a few days.)
You can't get Trailer Trash except maybe on eBay. (Hmm, it's only $13.99, actually - guess it's not that HTF.) You actually can still get Never Forget as a single bottle from Square Hue.
Added: I just noticed in this picture that this is Trailer Trash layered over what looks like black: