fair and square

/F EH1 R AH0 N D S K W EH0 R/
adverb
  1. 1

    Totally fairly and undoubtedly.

    โ€œWe won the game fair and squareโ€

  2. 2

    Within the applicable rules.

Source: https://en.wiktionary.org/wiki/fair%20and%20square