Certifiable

adj, noun, slang

adj, noun, slang ·Moderate ·College level

Definitions

Noun
  1. 1
    A crazy person. informal

    "Forget the certifiables who are scrawling Hitler mustaches on pictures of the president."

Adjective
  1. 1
    That can or must be certified.
  2. 2
    Mentally ill to such an extent that involuntary institutionalization is appropriate; crazy. informal

    "If any person said to you in 1950 that in seventeen years Miss Stalin would defect to the West, you would rightly have considered that person certifiable. She has now done it, with impressive smoothness and conviction."

Adjective
  1. 1
    capable of being guaranteed or certified wordnet
  2. 2
    fit to be certified as insane (and treated accordingly) wordnet

Example

More examples

"Tom is a certifiable pain in the ass."

Etymology

From certify + -able.

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