pirate

(noun) someone who uses another person's words or ideas as if they were his own. Synonyms: plagiarist, plagiarizer, plagiariser, literary pirate.

(noun) someone who robs at sea or plunders the land from the sea without having a commission from any sovereign nation. Synonyms: buccaneer, sea robber, sea rover.

(noun) a ship that is manned by pirates. Synonyms: pirate ship.

(verb) copy illegally; of published material.

(verb) take arbitrarily or by force. Synonyms: commandeer, hijack, highjack. Example: "The cubans commandeered the plane and flew it to miami."