chop·per
 /ˈʧɑːpɚ/  noun  ,  pl   -pers
  1 [  count  ] : someone or something that chops something
   a food/wood chopper
  2 [  count  ] informal : helicopter
   The sound of choppers filled the sky.
   a chopper pilot
  3 [  count  ] chiefly US, informal : a motorcycle that has a front wheel which is farther forward than the handlebars — called also chopper bike
  4 choppers [  plural  ] chiefly US slang : teeth
   The dentist checked my choppers and said they look fine.