# mother of all

idiom

Source: https://englishreference.com/idiom/mother-of-all
Updated: 2026-08-10

## Meaning

Used before a plural noun to form a compound noun having the sense of: the greatest or largest of (its kind); the most epic example of (its kind).

## Examples

- That storm was the mother of all rainstorms.
- I have the mother of all headaches after working on the computer all day.
- After weeks of preparation, the team faced the mother of all challenges during the final presentation.
- My brother spent three hours cleaning the kitchen after he accidentally created the mother of all messes while trying to bake a cake.
- The mountain pass was blocked by the mother of all snowstorms, leaving the travelers stranded in the wilderness for three days.

## Origin

Calque of Arabic أُمّ (ʔumm, “mother (of)”). Popularized and given its current sense by Saddam Hussein's claim that the impending Gulf War would be the أُمّ المَعَارِك (ʔumm al-maʕārik, “mother of (all) battles”), though mother had long been used in somewhat similar senses in English, and other familial terms are used with the same meaning, like granddaddy (of all traffic jams) and father (of all battles).

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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.