mother of all

Phrase

colloquial

(colloquial) 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).

Japanese Meaning

（～の）究極の、最高の、最大のもの、最も素晴らしい例 / すべての中で最上級の、比類なきもの

What is this buttons?

The hurricane turned into the mother of all storms, lashing the coastline for days.

Google Translation / DeepL Translation

そのハリケーンは史上最大級の嵐となり、数日間沿岸を襲い続けた。

Details

Sense（1）

(colloquial) 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).

(etc)

Google Translation / DeepL Translation