on the button

Adjective on the button has 1 sense

• on the button(s = adj.all) on the nose - being precise with regard to a prescribed or specified criterion; "his guess was on the nose"; "the prediction for snow was right on the button"

Adverbial on the button has 1 sense

• on the button(r = adv.all) exactly, on the dot, on the nose, precisely - just as it should be; "`Precisely, my lord,' he said"