The Collaborative International Dictionary of English v.0.48:

Hobbledehoy \Hob"ble*de*hoy`\, Hobbletehoy \Hob"ble*te*hoy`\, n.
   [Written also hobbetyhoy, hobbarddehoy, hobbedehoy,
   hobdehoy.] [ Cf. Prob. E. hobbledygee with a limping
   movement; also F. hobereau, a country squire, E. hobby, and
   OF. hoi to-day; perh. the orig. sense was, an upstart of
   to-day.]
   A youth between boy and man; an awkward, gawky young fellow .
   [Colloq.]
   [1913 Webster]

         All the men, boys, and hobbledehoys attached to the
         farm.                                    --Dickens. .
   [1913 Webster]

WordNet (r) 3.0 (2006):

hobbledehoy
    n 1: an awkward bad-mannered adolescent boy