sibbens

from The Century Dictionary.

• noun A severe form of syphilis, with skineruptions resembling yaws, endemic in Scotland in the seventeenth and eighteenth centuries.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Med.) A contagious disease, endemic in Scotland, resembling the yaws. It is marked by ulceration of the throat and nose and by pustules and soft fungous excrescences upon the surface of the body. In the Orkneys the name is applied to the itch.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun medicine A contagious disease, once endemic in Scotland, resembling the yaws and marked by ulceration of the throat and nose and by pustules and soft fungous excrescences upon the surface of the body.