Wicked is the name of several things:

• Wicked (novel), a novel by Gregory Maguire based on L. Frank Baum's The Wonderful Wizard of Oz; full title: Wicked: The Life and Times of the Wicked Witch of the West
• Wicked (musical), a Broadway musical with music and lyrics by Stephen Schwartz and based on the novel above
• Wicked (film), a 1998 film starring Julia Stiles
• Wicked Pictures, a producer of porn movies
• Wicked problems, those which have incomplete, contradictory, and changing requirements; and solutions to them are often difficult to recognize as such because of complex interdependencies
• Wicked (hacker), Wicked is the call sign of one of the internet's infamous Old School hackers. This hacker often is considered a modern day "Robin Hood".
• Wicked (album), a 2005 album by S.U.N. Project
• Wicked, pronounced with one syllable, is an adjective meaning "possessing a wick."
• Wicked can be used as a slang term meaning "very" or "extremely." This use is most common in New England and Upstate New York. Example: "Wicked cool!"
• Wicked as an adverb meaning "very" originated in Puritanical New England with the idea that anything that was fun, exciting or good was "wicked".
• In the British Isles, Wicked can be used as a slang term for "excellent" or "great." Example: "That's wicked!"