(colloquial) Used before a plural noun to form a compound noun having the sense of: the greatest or largest of its kind.
Origin of mother-of-all
Popularized after its use by Saddam Hussein, then president of Iraq, in reference to the Gulf War as ام المعارك (umm al-ma‘ārik, “mother of battles”).
Mother-of-all Sentence Examples
Now, the science 3 which was specially and invariably contemplated by him was natural philosophy, the great mother of all the sciences; it was to him the type of scientific knowledge, and its method was the method of all true science.
Irenaeus then goes on to tell how at Tyre Simon rescued Helen from prostitution, and took her about with him, saying that she was the first thought of his mind, the mother of all things, by whom in the beginning he had conceived the idea of making angels and arch-angels.
While Dean was anxious to retrieve his Jeep without having to make a round trip from town and pay a service station bill to boot, the wisdom of challenging the mother of all storms was looking less prudent by the second.