Duffer

Duffer may refer to:
 * Duffer (Narnia), invisible dwarves in The Chronicles of Narnia
 * Duffer, in Australian English, a person occupied in cattle raiding
 * A weak player in the game of chess
 * Students organized to boost the spirit of the school during athletic and social events, often brought together during pep rallies.

In biology:
 * Discophora (butterfly), a genus of butterflies commonly known as duffers
 * Banded duffer (Discophora deo), a butterfly found in Asia
 * Common duffer (Discophora sondaica), a butterfly found in Southeast Asia
 * Great duffer (Discophora timora), a butterfly found in South Asia
 * Southern duffer (Discophora lepida), a butterfly found in India