wisecracker (?.)

• banana
• burlesquer
• caricaturist
• clown
• comedian
• comic
• cutup
• epigrammatist
• funnyman
• gag writer
• gagman
• gagster
• humorist
• ironist
• jester
• joker
• jokesmith
• jokester
• know-it-all
• lampooner
• madcap
• parodist
• prankster
• punner
• punster
• quipster
• reparteeist
• satirist
• smart
• smarty
• smarty-pants
• wag
• wagwit
• wise guy
• wiseacre
• wisehead
• wisenheimer
• wit
• witling
• zany