the mother of all

📖 general
Meaning
The largest or most important example of something.
Literal Meaning
the parent of all
Example
“This is the mother of all challenges we've faced in this project.”

More in general

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all bedlam breaks loose

A situation characterized by extreme confusion, chaos, or disorder.

all bets are off

The situation has entirely changed, and previous assumptions or agreements no longer apply.

all duck or no dinner

An all-or-nothing situation where one either achieves complete success or total failure.

all ears

Listening eagerly and attentively.