A female human who's attractiveness is a 9 or higher on a scale of 1-10 but projects a grumpy energy at passers that glance at her face ,tits or her bum.
Hey David &Christy, I saw the most beautiful girl today while out walking my imaginary dog up at the college campus: I locked eyes with her tits & face and she totally didn't even give me a second look. David: She sounds like a Grumpy Cunt. Christy: A grumpy Cunt indeed.