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Definition of Mother of all
1. Phrase. (colloquial) Used before a plural noun to form a compound noun having the sense of: the greatest or largest of its kind. ¹
¹ Source: wiktionary.com
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1. Phrase. (colloquial) Used before a plural noun to form a compound noun having the sense of: the greatest or largest of its kind. ¹
¹ Source: wiktionary.com