Source : WordNet®

prat
     n : the fleshy part of the human body that you sit on; "he
         deserves a good kick in the butt"; "are you going to sit
         on your fanny and do nothing?" [syn: {buttocks}, {nates},
          {arse}, {butt}, {backside}, {bum}, {buns}, {can}, {fundament},
          {hindquarters}, {hind end}, {keister}, {posterior}, {rear},
          {rear end}, {rump}, {stern}, {seat}, {tail}, {tail end},
          {tooshie}, {tush}, {bottom}, {behind}, {derriere}, {fanny},
          {ass}]