cowpoke

from WordNet (r) 3.0 (2006)

cowpoke
    n 1: a hired hand who tends cattle and performs other duties on
         horseback [syn: {cowboy}, {cowpuncher}, {puncher},
         {cowman}, {cattleman}, {cowpoke}, {cowhand}, {cowherd}]

from The Collaborative International Dictionary of English v.0.48

cowpoke \cowpoke\ n.
   a hired hand who tends cattle and performs other duties on
   horseback; -- an informal name for {cowboy}.

   Syn: cowboy, cowpuncher, puncher, cowman, cattleman, cowhand,
        cowherd.
        [WordNet 1.5]