1 definition by Cabby Abby
Stands for Restless Face Syndrome. Some people, while observing their behavior, cannot maintain a consistent facial expression. As a result their face moves rapidly and even occasionally twitches. This syndrome is also linked to the rare Hannahcyrus virus!
While videotaping Emily and talking about salted babies, her face went from happy, to confused, to out of control RFS.
by Cabby Abby July 31, 2010