Captain Smirk was an expert swordsman who taught his skill to worthy students in his home on Melee Island. He was known for a signature sarcastic expression, which often his students would pick up from him.
Among those he had trained was Carla who later became the island's swordmaster. He later trained Guybrush Threepwood in use of the sword and the basics of insult fighting. He believed that a well placed insult could be the winning blow a fight. When he felt his students were ready with basic training, he would introduce The Machine: a device he built to test a swordfighter's skills.
Smirk moved away as Ozzie Mandrill's tourism refurbishment began. When Guybrush asked Carla and Otis about him during his search for the Ultimate Insult, Carla told him that Smirk had been challenged to a game of Insult Gin-Rummy by an 'Australian land developer' referring to Mandrill. He was beaten, signed over the deeds to his house and left Melee Island in shame. It is unknown whether he ever returned to Melee Island.