on the button

Exactly right

Kate had been certain that Edmond was going to propose tonight, and when he got down on bended knee she knew she'd been right on the button.

Definitions

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• s  being precise with regard to a prescribed or specified criterion
• r  just as it should be

News & Articles

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• Senate on the Brink of 'Nuclear' War Over Nominations
  Another round of brinkmanship over political appointments is under way in the Senate, with Majority Leader Harry Reid, D-Nev., once again putting his finger squarely on the button of the "nuclear option" viewed with horror by Republicans.
  July 11, 2013 - National Journal via Yahoo! News