What does "mother" mean?

In addition to the idiom beginning with mother, also see necessity is the mother of invention.

See mother in WNW Idioms

the mother of all

something regarded as the biggest, most impressive, or most important of (its kind): often used humorously [the mother of all yard sales]

the mother of all

something regarded as the biggest, most impressive, or most important of (its kind): often used humorously [the mother of all yard sales]

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