'on the button' definitions:

Definition of 'on the button'

(from WordNet)
adverb
Just as it should be; "`Precisely, my lord,' he said" [syn: precisely, exactly, on the nose, on the dot, on the button]
adjective
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" [syn: on the nose, on the button]