The Collaborative International Dictionary of English v.0.48:

Popinjay \Pop"in*jay\, n. [OE. popingay, papejay, OF. papegai,
   papegaut; cf. Pr. papagai, Sp. & Pg. papagayo, It.
   pappagallo, LGr. ?, NGr. ?; in which the first syllables are
   perhaps imitative of the bird's chatter, and the last either
   fr. L. gallus cock, or the same word as E. jay, F. geai. Cf.
   Papagay.]
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   1. (Zool.)
      (a) The green woodpecker.
      (b) A parrot.
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                The pye and popyngay speak they know not what.
                                                  --Tyndale.
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   2. A target in the form of a parrot. [Scot.]
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   3. A trifling, chattering, fop or coxcomb. "To be so pestered
      with a popinjay." --Shak.
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The Collaborative International Dictionary of English v.0.48:

Yaffle \Yaf"fle\ (y[a^]f"f'l), n. [Probably imitative of its
   call or cry.] (Zool.)
   The European green woodpecker (Picus viridis syn. Genius
   viridis). It is noted for its loud laughlike note. Called
   also eccle, hewhole, highhoe, laughing bird,
   popinjay, rain bird, yaffil, yaffler, yaffingale,
   yappingale, yackel, and woodhack.
   [1913 Webster]

WordNet (r) 3.0 (2006):

popinjay
    n 1: a vain and talkative person (chatters like a parrot)
    2: an archaic term for a parrot