chopper in WordNet English dictionary

1. a grounder that bounces high in the air
   chop  chopper 
   
2. a butcher's knife having a large square blade
   cleaver  meat cleaver  chopper 
   
3. an aircraft without wings that obtains its lift from the rotation of overhead blades
   helicopter  chopper  whirlybird  eggbeater 
   
4. informal terms for a human `tooth'
   chopper  pearly