Mary Read was a seaman on a ship that was captured by pirates and she turned then to a life of piracy.
The Jolly Roger was a black flag flown to identify the vessel as a pirate ship. While the skull and crossbones is the most common of these flags, many great pirate captains designed custom symbols to identify exactly who is attacking.
"Shiver me timbers" is an expression of excitement or awe. Its origin has to do with sailing in heavy seas, when the ship is lifted up and pounded down so hard that the timbers are said to shiver.
Although pirates have been around since the Romans and Vikings, most pirating happened during the Golden Age of Piracy between 1680 and 1730.
Pirates believed that whistling on a ship would cause the weather to turn stormy. Consider the phrase 'to whistle up a storm.'