slogger

from WordNet (r) 3.0 (2006)

slogger
    n 1: someone who walks in a laborious heavy-footed manner [syn:
         {trudger}, {plodder}, {slogger}]
    2: someone who works slowly and monotonously for long hours
       [syn: {plodder}, {slogger}]
    3: a boxer noted for an ability to deliver hard punches [syn:
       {slugger}, {slogger}]

from The Collaborative International Dictionary of English v.0.48

Slogger \Slog"ger\ (sl[o^]g"g[~e]r), n.
   A hard hitter; a slugger. [Cant or Slang] --T. Hughes.
   [Webster 1913 Suppl.]