frothy

from WordNet (r) 3.0 (2006)

frothy
    adj 1: emitting or filled with bubbles as from carbonation or
           fermentation; "bubbling champagne"; "foamy (or frothy)
           beer" [syn: {bubbling}, {bubbly}, {foaming}, {foamy},
           {frothy}, {effervescing}, {spumy}]
    2: marked by high spirits or excitement; "his fertile
       effervescent mind"; "scintillating personality"; "a row of
       sparkly cheerleaders" [syn: {bubbling}, {effervescent},
       {frothy}, {scintillating}, {sparkly}]

from The Collaborative International Dictionary of English v.0.48

Frothy \Froth"y\, a. [Compar. {Frothier}; superl. {Frothiest}.]
   1. Full of foam or froth, or consisting of froth or light
      bubbles; spumous; foamy.
      [1913 Webster]

   2. Not firm or solid; soft; unstable. --Bacon.
      [1913 Webster]

   3. Of the nature of froth; light; empty; unsubstantial; as, a
      frothy speaker or harangue. --Tillotson.
      [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

90 Moby Thesaurus words for "frothy":
      airy, asinine, barmy, birdbrained, birdwitted, brave, bravura,
      braw, bubbly, catchpenny, chichi, daring, dashing, downy, dressy,
      empty, ethereal, exhibitionistic, fatuous, featherbrained,
      feathery, flashing, flashy, flaunting, flighty, flimsy, fluffy,
      foam-flecked, foamy, foolish, fribble, fribbling, frilly,
      frivolous, futile, gallant, gay, glittering, gossamery, heady,
      idle, imponderous, inane, jaunty, jazzy, lathery, leger, light,
      light as air, lighter than vanity, mousse, nugacious, nugatory,
      otiose, rakish, shallow, shallow-headed, shallow-minded,
      shallow-pated, shallow-witted, showy, silly, slender, slight,
      snazzy, soapsuddy, soapsudsy, soapy, souffle, splashy, splurgy,
      sporty, spumose, spumous, spumy, suddy, sudsy, superficial,
      trifling, trite, trivial, unheavy, unprofound, vacuous, vain,
      vapid, volatile, weightless, windy, yeasty