prank

(noun) acting like a clown or buffoon. Synonyms: buffoonery, clowning, japery, frivolity, harlequinade.

(noun) a ludicrous or grotesque act done for fun and amusement. Synonyms: antic, joke, trick, caper, put-on.

(verb) dress or decorate showily or gaudily. Example: "Roses were pranking the lawn."

(verb) dress up showily. Example: "He pranked himself out in his best clothes."