hanky-panky

noun

informal

the public takes a dim view of hanky-panky among public officials:

goings-on, funny business, mischief, misbehavior, misconduct, chicanery, dishonesty, deception, deceit, trickery, intrigue, skulduggery, subterfuge, machinations;

extramarital sex, infidelity, unfaithfulness, adultery, liaison, affair, fling;

informal monkey business, shenanigans, carryings-on, carry-on, fooling around, playing around;

British, informal jiggery-pokery, monkey tricks;

North American, informal monkeyshines;

formal fornication;

archaic knavery.

▷antonyms good behavior; fidelity.