There are currently no multiple use codes for clothing. But it seems every month there is a new code, one month : darkfire for the Darkfire Cutlass ( expired ). another month: fizz for the potion Flatulent Fizz.
Previously, special articles of clothing (a skull bandana and a red skull bandana) were given away as promotion and pirates had to enter the Code at Tailor Shops. Since then, no reedeem code clothing has been offered.