forkscraper
A person who has the cringeworthy habit of letting silverware scrape against their teeth when they eat. Go ahead and try it yourself, then you'll know how uncomfortable it feels, and therefore, what this says about the forkscraper: that they're a weirdo.
Sarah was a constant forkscraper on our first date, which was the dealbreaker for me, because it's rilly obnoxious.