(n.) One who composes epigrams, or makes use of them.

burlesquer caricaturist clown comedian comic cutup epigrammatist funnyman gag writer gagman gagster humorist ironist jester joker jokesmith jokester lampooner madcap parodist prankster punner punster quipster reparteeist satirist wag wagwit wisecracker wit witling zany