Resting Bitch Face Syndrome is when somebody is relaxing, listening to another speak, driving, pushing a grocery cart, or otherwise mellow but their facial expression is semi-murderous. They look annoyed, angry , frustrated, irritated, or pissed. They look like their partner cheated on them, their dog shat on the floor or their kid puked on their boss at a company party when in reality they’re perfectly happy, they just happen to be a victim of Resting Bitch Face Syndrome.
The signs and symptoms of Resting Bitch Face Syndrome are varied. This person looks to be relaxing but their face says they’re ready to spring on you like an angry spider monkey and claw your face off. Also possible are arching of eyebrows, frowning, fidgeting and other signs of agitation.
Actress Anna Paquin of True Blood bemoaned her “RBF” during an appearance on Jimmy Kimmel Live, saying that despite being happy and satisfied with her life, her default face makes her look like she “wants to kill people.”
Keep in mind that these are just facial expressions. The person isn’t actually angry and chances are you aren’t actually in any danger.