pixie

noun

1. a fairy or sprite, especially a mischievous one.
2. a small, pert, or mischievous person.

adjective

3. Also pix·ie·ish, pix·y·ish. playfully impish or mischievous; prankish: pixie mood; a pixie sense of humor.

noun plural pixies

1. (in folklore) a fairy or elf

n.c.1630, of obscure origin, perhaps from or relatred to Swedish dialect pyske “small fairy,” but West County origin suggests ultimate source in Cornwall and thus something Celtic. Earliest references were in pixy-path “bewilderment,” literally “path on which one is led astray by pixies,” and pixie-led “lost.”