Know-everythingism

noun, slang

noun, slang ·Uncommon ·College level

Definitions

Noun
  1. 1
    The belief that one knows everything and the belief that it is possible to do so. informal, uncommon, uncountable

    "For a time, the forces of Know-Everythingism held sway."

Example

More examples

"For a time, the forces of Know-Everythingism held sway."

Etymology

From know-everything + -ism.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.