Pirating

To appropriate by piracy, plunder at sea.

"They pirated the tanker and sailed to a port where they could sell the ship and cargo."

(intellectual property) To create and/or sell an unauthorized copy of

(intellectual property) To knowingly obtain an unauthorized copy of

"Not willing to pay full price for the computer game, Heidi pirated a copy."

To engage in piracy.

"He pirated in the Atlantic for years before becoming a privateer for the Queen."