He's got the Knack

That’s a Corker!

A corker is the last word on a topic.

So, basically it’s the grandfather of Urban Dictionary: no u ?

Not quite; that is a bit negative. A Corker is a winning blow, which kinda fits your link; but it is not so heavy.

It is softer in practice: meaning “a brilliant solution” (“the best” in inverted commas) without judging the rest.

Being an engineer and married, my wife can totally relate.

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