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"ice hockey disk," 1891, possibly from puck (v.) "to hit, strike" (1861), which perhaps is related to poke (v.) via notion of "push." Another suggestion traces the noun to Irish poc "bag."
"mischievous fairy" (in "A Midsummer Night's Dream"), probably from pouke "devil, evil spirit" (c.1300), from Old English puca, pucel "goblin," cognate with Old Norse puki "devil, fiend," of unknown origin (cf. pug). Celtic origins also have been proposed. Capitalized since 16c. His disguised name was Robin Goodfellow.
in medieval English folklore, a malicious fairy or demon. In Old and Middle English the word meant simply "demon." In Elizabethan lore he was a mischievous, brownielike fairy also called Robin Goodfellow, or Hobgoblin. As one of the leading characters in William Shakespeare's Midsummer Night's Dream, Puck boasts of his pranks of changing shapes, misleading travelers at night, spoiling milk, frightening young girls, and tripping venerable old dames. The Irish pooka, or puca, and the Welsh pwcca are similar household spirits