Lumpy is a popular nickname for characters in media.
- Clarence Rutherford, a teenage friend of the boys in Leave it to Beaver
- Lumpawarrump, the son of Chewbacca in Star Wars
- Nickname of PGA Tour pro Tim Herron
- Lumpy, the fictional moose from Happy Tree Friends.
- Lumpy the cook, in King Kong (2005 film)
- Lumpy the Heffalump, from Pooh's Heffalump Movie and Pooh's Heffalump Halloween Movie
- A common nickname coined by Eddy for Ed, a character from Cartoon Network's Ed, Edd n Eddy