Most Helpful Guy
Depends on the length, there are ones that basically look like curtains over a bra. For example (The third one down): https://stylewile. com/crop-tops-ages/
But, this isn't trashy, https://www.kadinvehayat net/wp-content/uploads/2014/05/dizzybrunette3-zara-pencil-skirt-outfit-crop-top. jpg
Whenever you think something maybe trashy just think, what would your father think, if you are a girl, and mother, if you are boy. If you think they would freak out, you probably shouldn't wear it. I don't think I would ever go out looking like I just rolled out of bed, my mother would probably freak out if she somehow seen me.
Most Helpful Girl
I find them just plain trashy, and very very very classless, but they are fine to just wear around the house, out in public, they are just downright trashy, and if I saw someone out in public with one on, I'd probably mistake them as a hooker, because that's obviously the style they are going for, they would also be fine if you wore them by a poolside over your bathing suit but that's it.