the bottom drops/falls out of somebody's world

the bottom drops out of (one's) world

Someone loses their entire sense of happiness, purpose, motivation, or confidence. His entire life was devoted to becoming a fighter pilot, so the bottom dropped out of his world when an injury from a car accident meant he could no longer fly.
See also: bottom, drop, of, out, world
Farlex Dictionary of Idioms.

the ˌbottom drops/falls out of somebody’s ˈworld

a person suddenly loses all their happiness, self-confidence, etc: When his wife left him, the bottom dropped out of his world.
See also: bottom, drop, fall, of, out, world
Farlex Partner Idioms Dictionary
See also:
  • the bottom drops out of (one's) world
  • the bottom falls out of (one's) world
  • the bottom falls out of your world
  • distribute
  • distribute (something) over (something)
  • distribute over
  • supply (someone or something) with (someone or something)
  • supply with
  • carry (someone) off their feet
  • in all my born days