Swashbuckler is another popular term for pirate. But, it really just means a flamboyant swordsman, adventurer, or a sword-wielding ruffian. Swashbuckler is also one of the names that is given to a player that has chosen a written name, as Swashbuckler would be the temporary name.
It is also the third-highest rank given for PvP Infamy. To achieve this rank, a pirate must already be a Buccaneer and then earn 2,000 additional points in pirate vs. pirate fights. It takes 4,500 total Infamy points to reach this rank.