RBFS 

Resting Bitch-Face Syndrome. When a woman seems like she's always crampy and full of shit even when she's just sitting down doing nothing and resting, thinking about good times.

A- "That woman just gave me a death stare."
B- "Nah, that's her normal face. She's got RBFS."

RBFS by Carlo89 June 9, 2015

RBFS 

The medical variant of resting bitch face otherwise known as RBF. RBFS is resting bitch face syndrome. It is a diagnosis of the the RBF

If you really get to know her she’s amazing. Although, it is unfortunate she has RBFS.

RBFS by Savaged savaged May 29, 2023