The term 'Fearless Flyer' is a job title for an ACE, which stands for Airline Customer Experience. An ACE is responsible for providing excellent customer service to airline passengers, ensuring their safety and comfort throughout their journey. They are also responsible for resolving any issues that may arise during the flight. The Fearless Flyer is expected to be knowledgeable about the airline's policies and procedures, as well as the regulations of the Federal Aviation Administration.