The phrase itself is a clashing of gears. "Buccaneer" is a word of edges and smoke, derived from the French boucanier —one who smokes meat on a wooden frame, a hunter of feral cattle on the shores of Hispaniola. It is a word of survival, of grit, of blood drying on the sand. "Lusty," by contrast, is a word of the blood running hot. It implies vigor, strength, desire, and a certain rude health.
This archetype thrives in genres where history blurs into fantasy: lusty buccaners