Wiktionary
vb. (context idiomatic intransitive English) absolve completely for a past wrongdoing; pardon with neither resentment nor a view to retribution.
Wikipedia
Forgive and Forget may refer to:
Forgive and Forget is a 2000 British made-for-television film in which a young latent gay man confronts his sexuality and increasing jealousy when his best friend moves in with his new girlfriend. The film was broadcast on ITV on 3 January 2000.
Usage examples of "forgive and forget".
She and Franz-Josef hadn't dealt too well since he'd poxed her, and she'd taken to wandering Europe while he pleaded with her to forgive and forget.
Ishido passed over the veiled sneer about ronin, the masterless, almost outcast mercenary samurai who had, in their thousands, flocked to the Heir's banner when Ishido had whispered it abroad that he, on behalf of the Heir and the mother of the Heir, would accept their fidelity, would incredibly - forgive and forget their indiscretions or past, and would, in the course of time, repay their loyalty with a Taikd's lavishness.