Subject to interpretation, yet many definitions have a common theme:
  1. It is a hot, firey place of purgatory where the souls of the dead are punished for their mortal sins. Detailed in Dante's Inferno, or perhaps Larry Niven's reconstruction.
  2. A highly undesirable location where every moment is torture, like suburbia.
  3. "H-E-double-hockeysticks" when conforming to American broadcast restrictions.