colt·ish /ˈkoltɪʃ/
  (a.)小馬似的,輕佻的,不受拘束的
  Colt·ish a. Like a colt; wanton; frisky.
     He was all coltish, full of ragery.   --Chaucer.
  -- Colt*ish*ly, adv. -- Colt*ish*ness, n.
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  coltish
       adj : given to merry frolicking; "frolicsome students celebrated
             their graduation with parties and practical jokes"
             [syn: frolicsome, frolicky, rollicking, sportive]