The flare is an acrobatic move in which the performer alternates balancing the torso between either arm while swinging the legs beneath in continuous circles.
It is a fundamental b-boying/bgirl power move, and in gymnastics it may be performed on a pommel horse or during the floor exercise.
A progression for this move would be double leg circles on a mushroom (similar to a pommel horse but rounded and lower down).
There are several flare variants: The Airflare, sometimes also called an Airtrack, is an advanced move that is similar in concept to a Halo, also known as Headtracks or just tracks.
While performing an Air Flare, the breaker is inverted with his torso at a 45-degree angle to the floor.