Accord - A settlement or compromise of conflicting opinions.
Avast - Used as a command to stop or desist; to demand attention.
Aye - Agreement or acknowledgement; yes.
Barter - To trade goods or services without the exchange of money.
Berth - A space for a ship to dock or anchor.
Blighter - A fellow, especially one held in low esteem.
Bonny Lass - A pretty young girl or sweetheart.
Commandeer - To take arbitrarily or by force.
Davy Jones' Locker - The bottom of the ocean. To send someone to Davy Jones' Locker is to send them to a watery grave.
Eunuch - A man or boy whose testes are nonfunctioning or have been removed. An ineffectual, powerless, or unmasculine man.
Hearties - Comrade; good fellow; a term of familiar address and fellowship among sailors.
Love - A term of endearment. Welcome to the Caribbean, love.
Maroon - To intentionally abandon on a deserted island with nothing but a pistol and a single shot.
Mate(y) - A name to address someone as a good chum.
Mettle - Courage and fortitude; spirit.
Mutiny - Open rebellion against constituted authority, especially rebellion of sailors against superior officers.
Onesies - Oneself. To be "all by my onesies" is to be "all be myself".
Parley - A right outlined in the code of the brethren whereby an adversary may demand to be taken to the captain unharmed.
Pilfer - To steal or filch.
Plunder - (noun) Property stolen by fraud or force; booty.
Poppet - (Chiefly British) A darling.
Rape, Pillage & Plunder - Most common actions associated with pirates; phrase used to describe a pirate's way of life.
Robert's your uncle/Fanny's your aunt - All will be well; simple as that.
Rudder - A vertically hinged plate of metal, fiberglass, or wood mounted at the stern of a ship or boat for directing its course.
Save - With the exception of; except.
Savvy - To understand; comprehend.
Scallywag - A reprobate; a rascal; a deceitful and unreliable scoundrel.
Scoundrel - A mean, worthless fellow; a rascal; a villain; a man without honor or virtue.
Shiver Me Timbers - An expression of surprise or strong emotion.
Square - To bring into balance; settle.
Swag - Stolen property; loot.
Tortuga - An island in the West Indies off northern Haiti. It was a pirate refuge in the 17th century.
Whelp - An impudent young fellow.