A degenerate disease afflicting mostly males. Common indicators include alcoholism, hair loss, tooth loss, limb loss, an affinity for the letter "R", skin ailments, and a constant desire to plunder more booty. Symptoms may be subdued through exposure to gold and women. No cure has been found to date.
That dude's lifestyle has cost him his youth. The piratitis is so bad he's starting to look like the crypt keeper.