chopper, n.
1 a Brit. a short axe with a large blade. b a butcher's cleaver.
2 colloq. a helicopter.
3 a device for regularly interrupting an electric current or light-beam.
4 colloq. a type of bicycle or motor cycle with high handlebars.
5 (in pl.) Brit. sl. teeth.
6 US sl. a machine-gun.