good-for-nothing

good-for-nothing (http://definr.com/good-for-nothing)

     adj : without merit; "a sorry horse"; "a sorry excuse"; "a lazy
           no-count, good-for-nothing goldbrick"; "the car was a
           no-good piece of junk" [syn: good-for-naught, meritless,
            no-account, no-count, no-good, sorry]
     n : an idle worthless person [syn: goldbrick, goof-off, ne'er-do-well,
          good-for-naught]