the mother of all

idiom

Definition of the mother of all

—used to say that something is larger, better, worse, etc., than all other things of the same kind It has been described as the mother of all construction projects.

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Cite this Entry

“The mother of all.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/the%20mother%20of%20all. Accessed 18 Aug. 2022.

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