tagsore

from The Century Dictionary.

• noun A disease in sheep, in which the tail becomes excoriated and sticks to the fleece in consequence of diarrhea. Also called tag-belt.

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

• noun (Far.), obsolete Adhesion of the tail of a sheep to the wool from excoriation produced by contact with the feces; -- called also tagbelt.