Source : WordNet®

gimmick
     n 1: something whose name is either forgotten or not known [syn:
          {dohickey}, {dojigger}, {doodad}, {doohickey}, {hickey},
           {gizmo}, {gismo}, {gubbins}, {thingamabob}, {thingumabob},
           {thingmabob}, {thingamajig}, {thingumajig}, {thingmajig},
           {thingummy}]
     2: any clever (deceptive) maneuver; "he would stoop to any
        device to win a point" [syn: {device}, {twist}]