dead on

/D EH1 D AA0 N/
adjective
  1. 1

    Very accurate

    โ€œHer Sarah Palin impersonation is dead on!โ€

adverb
  1. 1

    Exactly at

    โ€œThe train arrived dead on 2 o'clock.โ€

Source: https://en.wiktionary.org/wiki/dead%20on