Source : WordNet®

fatty
     adj : containing or composed of fat; "fatty food"; "fat tissue"
           [syn: {fat}] [ant: {nonfat}]
     [also: {fattiest}, {fattier}]

fatty
     n : a rotund individual [syn: {fatso}, {fat person}, {roly-poly},
          {butterball}] [ant: {thin person}]
     [also: {fattiest}, {fattier}]

fattier
     See {fatty}