To be smelt is to be very, very attractive. One can be smelt due to how they look, or even just how they act. Sometimes the cause of a person's smeltness cannot be directly pin-pointed, they just are smelt.
For example:
"There's something about that girl Carly, she's so pretty and awesome, she's smelt af."
"Suzy just has a magical aura. She's perfection. She's pretty damn smelt."
10👍 4👎