/puk/ , n.
1. Also called Hobgoblin, Robin Goodfellow . a particularly mischievous sprite in English folklore who appears as a character in Shakespeare's A Midsummer Night's Dream.
2. ( l.c. ) a malicious or mischievous demon or spirit; a goblin.
[ bef. 1000; ME pouke, OE puca; c. ON puki a mischievous demon ]