This Looney Tunes t-shirt shows Bugs Bunny delivering his catchphrase, "Ehhhhh What's Up Doc?" Bugs Bunny was the breakout star from Looney Tunes, and he is so popular that he became a household name and a corporate mascot for the Warner Bros. company. The mischievous trickster has appeared in more films than any other cartoon character, and he can always be heard saying the catchphrase that appears on this t-shirt.