Little Person Meaning

(fantasy) A small magical humanoid creature, such as an elf, leprechaun, or fairy.

Example: 2012, Vera Chouinard, Edward Hall, Robert Wilton, Towards Enabling Geographies, page 188:
  Here, the amount of personal space that is acknowledged for a little person is similar to that of a child.
1961, Muriel Saint Clare Byrne, Elizabethan Life in Town and Country, page 285:
  His nurse had told him all about changelings, and how the little people would always try to steal a beautiful human child out of its cradle and put in its stead one of their own ailing, puking brats […]
Used other than as an idiom: see little,‎ person.