the slut scarf is a scarf usually of poor quality and terrifying design, comprised of low-level fabric choice and used as a discussable ornament. it is, obviously, as defined, worn by sluts.
can be used as a bait or lore in finding potential mates, usually drunk and/or easily persuaded men in desperate need of instant copulation. the scarf is thus akin to the red light you'd find outside of a whorehouse.
not only did she go home with him, but she left her slut scarf behind on purpose, so he'd call her back.