rhyme without reason

a party theme inwhich partygoers pick a partner and pick costumes that rhyme with each other. popular examples include; belle and odell , kim k and nba , flapper and rapper , chef and ref

person 1: what are we going to wear to the rhyme without reason party?
person 2: what is you be post malone, and i’ll be a traffic cone?
person 1: done.