the end of the world as we know it

the end of the world as we know it

Refers hyperbolically to some sudden or unexpected deviation from what is familiar or customary. Well, whoever is elected, it won't be the end of the world as we know it; each candidate is as good or bad as the other in my book.
See also: end, know, of, we, world
Farlex Dictionary of Idioms.

the end of the world as we know it

and TEOTWAWKI
phr. & comp. abb. said to emphasize that things change, often a lot. Yes, you have to buy the operating system separately. It’s TEOTWAWKI.
See also: end, know, of, we, world
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • the end of civilization as we know it
  • TEOTWAWKI
  • everyone and their brother
  • days are numbered, one's
  • (someone's or something's) days are numbered
  • everyone and their mother
  • go crazy
  • can't get over (something)
  • can't get over something
  • be a fate worse than death