# boiling frog

idiom

Source: https://englishreference.com/idiom/boiling-frog
Updated: 2026-08-10

## Meaning

A person who, or thing which, is in a gradually worsening situation without any realization of the peril until it is too late.

## Examples

- He is a boiling frog, ignoring the small problems until they become a disaster.
- By slowly accepting lower standards at work, she became a boiling frog and did not notice the toxic environment until she was completely miserable.
- The citizens acted as a boiling frog, gradually surrendering their basic freedoms to the authoritarian regime until the loss of liberty became impossible to reverse.

## Origin

The term is derived from a widespread misconception regarding the physiological response of a frog to rising temperatures. The narrative maintains that a frog placed in boiling water will immediately jump out, whereas a frog placed in water that is heated slowly will fail to perceive the mounting danger and will be cooked to death. The premise is an illustrative anecdote rather than a biological reality. While the story suggests a fatal lack of awareness, the physical frog is typically more perceptive than the fable implies, though the idiom remains a standard reference for the inability to recognise a gradual decline into disaster.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.