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.
right on the button
Precisely accurate; exactly correct. I won the contest because my guess was on the button.I think her assessment of the situation is right on the button.
right on the button
If someone says that you are right on the button, they mean that you have guessed correctly about something. `Am I right?' — `Right on the button.'The important thing is that the Treasury's forecast was right on the button. Note: You can also say that someone is on the button. The one who guesses on the button, picks up a big, mystery prize.