E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
An imaginary chieftain, but in reality the drover of a flock of sheep. Don Quixote conceived him to be the Christian King of the Garamantians, surnamed the Naked Arm, because he always entered the field with his right arm bare. The driver of a flock from the opposite direction was dubbed by the Don the Emperor Alifanfaron of the isle of Taprobana, a pagan (Cervantes: Don Quixote, pt. i. bk. iii. 4.)