An Imp is a mythological being similar to a fairy, frequently described in folklore and superstition.
Imps are usually described as mischievous more than seriously threatening, and as lesser beings rather than more important supernatural beings. The attendants of the devil are sometimes described as imps. They are usually described as lively and having small stature. They are usually, but not invariably, assigned male gender.
Imps are the least evil of all demons, described as dark, shadowy creatures — while mischievous and somewhat destructive; they do not go to the extremes of, for example, gremlins or poltergeists. Imps are shape-shifters — preferring a shadow-form similar to either a weasel or a spider; they slink or skitter about, running from one pool of shadow to another. The trickery ascribed to them is, generally, confined to missing, misplaced, or moved articles (socks, keys, etc.) and stubbed toes. Some accounts of imps claim that they are desperately lonely, and always travel in pairs or in mobs.
Some accounts of imps treat them as capable of being turned to good, because they are so desperately lonely they would do almost anything — even commit good deeds — to have a committed friend; however, it is regarded as almost impossible for any imp to fully forsake its "impish" ways.
The Ancient Greek demi-god Pan has some features in common with an imp, but this is unlikely to be a direct connection, since the imp concept probably belongs to Germanic rather than classical tradition. However, Imps are sometimes described as fond of music, and capable of being charmed into making a promise to aid, and "do good" in that manner through music — though there is always likely to be some mischievous trick to be attached to the barter.
Imps are sometimes described as a subunit of a pack of Brownies, but also to describe certain children's behaviour. Furthermore, it has been adopted as a brand name for a variety of commodities where an image of small size, liveliness, and cheekiness was sought, for example the Hillman Imp car.