Tonight I watched ABC's Nightline and frankly it pissed me off. They did a feature on New Adult fiction featuring Colleen Hoover. They referred to her book Slammed, and the whole genre as "smut." they kept comparing her books, and Jamie McGuire's, and the rest of the emerging NA glitterati to that drek 50 Shades of Grey, which was poorly written smut IMHO. I've left comments on their page, and let them know how disappointed I was by a show that is usually journalistic ethically excellent would talk about books obviously not a single person on their staff had ever read.
I challenge people to read books by authors like Colleen Hoover, Jamie McGuire, Jessica Park, Nyrae Dawn, Steph Campbell, Jolene Perry or Liz Reinherdt and see if they consider ANY of it smut.
Great stories about love and loss, coming of age, finding yourself and healing after trauma, even those that contain some erotic parts (as does life itself I might note!) are NOT smut.
From the free online dictionary
Smut: A: Obscenity in speech or print