lazy eight

/L EY1 Z IY0 EY0 T/
noun
  1. 1

    The symbol ∞ or anything of the same shape.

  2. 2

    (aviation) An aerobatic maneuver consisting of 1/4 looping up, wingover (left or right), 1/2 looping down+up, wingover (right or left), 1/4 looping down.