Source : Webster's Revised Unabridged Dictionary (1913)

Slogger \Slog"ger\, n.
   A hard hitter; a slugger. [Cant or Slang] --T. Hughes.

Source : WordNet®

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