chopper

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One that chops.
• noun Archaeology A crudely flaked core tool, especially one of the early Paleolithic Period.
• noun A device that interrupts an electric current or a beam of radiation.
• noun Informal A helicopter.
• noun Slang Teeth, especially a set of false teeth.
• noun Informal A motorcycle, especially one that is customized.
• noun Baseball A ground ball that is hit with a chopping swing, especially one that bounces high off the infield.
• intransitive & transitive verb Informal To travel by helicopter or transport (someone or something) by helicopter.

from The Century Dictionary.

• noun One who or that which chops; specifically, a butchers' cleaver.—
• noun A hand-tool used for thinning out rows of young plants.
• noun A cheek of bacon.
• noun A stout, lusty child; a bouncer.
• noun A thatched roof. See chopper-cot and choppered.

from the GNU version of the Collaborative International Dictionary of English.

• noun One who, or that which, chops.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A tool for chopping wood; an axe/ax.
• noun A knife for chopping food.
• noun informal A helicopter.
• noun slang The penis.
• noun informal A type of road motorcycle, especially as used by biker / bikie gangs.
• noun slang An AK-47 or similar assault rifle.
• verb informal To travel or transport by helicopter.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun informal terms for a human `tooth'
• noun an aircraft without wings that obtains its lift from the rotation of overhead blades
• noun a butcher's knife having a large square blade
• noun a grounder that bounces high in the air