"Resting bitch face" is a condition wherein you look - well, bitchy - due to your normal, everyday facial expression. It's also sometimes just referred to as simply "being from New York City".
Hope Davis, one woman who got surgery for the condition after her friends uploaded "a batch of unflattering photos to Facebook and Instagram", said:
"I was like, 'Oh great, I look mad in the middle of the party'. I looked like a sourpuss."
Davis didn't comment on whether or not she actually was "mad in the middle of the party" - a road we hope she considered before having someone slice her face open. Perhaps she just wasn't having a good day at the time.
But it's too late to look back now. She, like many other women, turned right to a plastic surgeon.