boyish

from WordNet (r) 3.0 (2006)

boyish
    adj 1: befitting or characteristic of a young boy; "a boyish
           grin"; "schoolboyish pranks" [syn: {boyish}, {boylike},
           {schoolboyish}]

from The Collaborative International Dictionary of English v.0.48

Boyish \Boy"ish\, a.
   Resembling a boy in a manners or opinions; belonging to a
   boy; childish; trifling; puerile.
   [1913 Webster]

         A boyish, odd conceit.                   --Baillie.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

69 Moby Thesaurus words for "boyish":
      adolescent, airy, attenuate, attenuated, beardless, boylike,
      calflike, childish, childlike, coltish, delicate, diaphanous,
      diluted, ethereal, fine, fine-drawn, finespun, flimsy, frail,
      gauzy, girlish, girllike, gossamer, gracile, immature,
      insubstantial, juvenile, kiddish, lacy, light, maiden, maidenly,
      misty, papery, puerile, puplike, puppyish, puppylike, rare,
      rarefied, slender, slenderish, slight, slight-made, slim, slimmish,
      slinky, small, subtle, svelte, sylphlike, tenuous, thin,
      thin-bodied, thin-set, thin-spun, thinnish, threadlike, vague,
      wasp-waisted, watered, watered-down, watery, weak, willowy,
      wiredrawn, wispy, young, youthful