Really disgusting or hugely irritating to point of being equivalent to nails on a chalkboard. Often used by drag queens to describe a really heinous performance or by women and gay men dishing out shade against another for being gross looking, sexually unappealing, or otherwise unsettling in appearance or nature.
Eww...that bitch's voice is so nails. I just want to pull her tracks out and stuff her mouth with a toilet wand.
by A. Chav December 05, 2013