Other forms: waggeries
A state of being silly or mischiveous is waggery. Your extremely formal, old-fashioned teacher might bring the class's outbreak of giggles to an end by shouting, "Enough of that waggery!"
Not too many people use the word waggery these days, but it's the perfect way to describe someone's jocular, playful — but slightly wicked — remarks or behavior. You can tell your impish little sister you're tired of her waggery or accuse your practical-joking uncle of waggery. The word, along with the adjective waggish, comes from wag, or "jokester."