on the button

on the button

exactly right; in exactly the right place; at exactly the right time. That's it! You're right on the button. He got here at one o'clock on the button.

See also: button

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(right) on the button  (mainly American informal)

if a remark is on the button, it is exactly right Your remarks about Tim were right on the button. He's arrogant, rude and selfish.

See also: button

on the button  (mainly American informal)

if something happens at a particular time or is a particular amount on the button, it happens at exactly that time or is exactly that amount We always sit down to eat at 6.00 on the button.

See also: button