Definitions of sky-high:

  • adverb:   to a very high level
    Example: "Prices have gone sky-high"
  • adverb:   in a lavish or enthusiastic manner
    Example: "He extolled her virtues sky-high"
  • adverb:   (with verb `to blow') destroyed completely; blown apart or to pieces
    Example: "They blew the bridge sky-high"