Vicky the Viking (also Wikki or Wickie), a 1970s animated cartoon character
Wiki Dankowska, a fictional character in the British television show Coronation Street
Musicedit
"Jam on Revenge (the Wikki-Wikki Song)", a 1983 single by the band Newcleus
"Wiki wiki", a phrase meant to simulate a DJ scratching a turntable, used by Newcleus in several songs as well as Will Smith's "Wild Wild West", among others
Other uses in arts, entertainment, and mediaedit
WIKI (FM) a country music radio station in Carrollton, Kentucky, United States
"Wiki-wiki", a story (and title character) written by the title character of Jack London's novel Martin Eden