1. Of, or concerning, the pinnacle of nastiness. Appallingly ugly.
1. sung There she is, Miss Narsty. She should be locked in a box.
Combination of gnarly and nasty.
That gal over there with the 5 o'clock shadow sure is narsty.
Basically a retardation of the word nasty, but invoking more disgust and repulsion.
"Ugh, did you see those autopsy close ups on CSI?"
"Yeah, that was narsty."