A know-it-all is a person who appears to offers expert opinion, without possessing it.
Know-it-all or know-all may also refer to:
Books
- The Know-It-All, a 2004 book by A.J. Jacobs
- "Doctor Know-all", a German fairy tale
Film and TV
- "Know All", an episode of Round the Twist, an Australian children's TV series
- Knowitalls, a 2009 British quiz show
- Mister Know-It-All, an American animated web series
- Mr. Know-It-All, a segment of the American Rocky and Bullwinkle TV cartoon
Music
- Know-It-All (album), a 2015 album by Alessia Cara
- "Mr. Know It All", a 2011 single by Kelly Clarkson
- "He's Misstra Know-It-All", a 1974 Stevie Wonder song
See also
- Canada's Greatest Know-It-All, a 2012 Canadian reality television series
- Like You Know It All, a 2009 South Korean comedy-drama
- Please Kill Mr. Know It All, a 2013 Canadian romantic comedy film