mirror.co.uk – Courtney Pochin – Resting bitch face. It’s a term I’m sure you’ve come across before. Also known as RBF or bitchy resting face, it’s defined as a facial expression that makes a person appear angry or irritated at a time when they are actually relaxed or not intending to express any kind of emotion. Some people embrace having this, saying it wards off unwanted advances from strangers, but others see it as a negative and want to be more approachable. And according to a plastic surgeon many people out there are desperately trying to rid themselves of their RBF by paying for procedures.