English Reference
Idiom idiom

next thing one knows


suddenly, out of the blue.

Meaning adapted from Wiktionary, available under CC BY-SA 4.0.


SIMPLE

I blinked, and next thing I knew, the cat was gone.

CONTEXTUAL

We were just talking about the weather, and next thing I knew, he was asking me for a huge favor.

COMPLEX

The argument began with a minor disagreement over dinner, yet next thing they knew, they were packing their bags and ending the relationship.


Related idioms8entries
  1. 01

    a week from next Tuesday

    Some unspecified time in the future.

  2. 02

    as best one can

    In the best possible way, given one's circumstances and abilities.

  3. 03

    as far as one knows

    To the best of one's knowledge, as far as someone knows or possible information to be gathered about the topic, subject, aspect, or situation.

  4. 04

    as the next girl

    To a reasonable degree; as much as a typical woman.

  5. 05

    as the next guy

    To a reasonable degree; as much as a typical person or man.

  6. 06

    as the next person

    To a reasonable degree; as much as a typical person.

  7. 07

    as you know

    as it is already known.

  8. 08

    back to square one

    Located back at the start, as after a dead end or failure.

Last updated August 10, 2026