(UK, dated) A small room connected to a threshing floor.
1981, J E C Peters, Discovering Traditional Farm Buildings, http://books.google.com/books?id=dLH_LEQkjKEC&pg=PA17&dq=cornhole page 17 with illustration
:
A small room may be found opening off the threshing floor on one side … This is the cornhole, a mid-eighteenth-century development so far known only in Staffordshire and Suffolk, with a few in east Sussex.
(US) A game similar to beanbag toss, popular in Ohio, in which a bag is filled with corn feed and thrown into a hole.
2002, “Cornhole Gameâ€,Cincinnati Magazine, October 2002, page 114:Cornhole, the indigenous pastime of Cincinnati's west side, is basically a democratized version of horseshoes.
2009, F. Winternitz, S. Bellman, Insiders' Guide to Cincinnati, page 230:Cincinnatians, of course, know the true meaning of cornhole. The homegrown bag-toss game, which some suggest was even invented here, requires few tools: some beanbags, a box with a hole in it, and… well, that's it, really.
(slang, vulgar) Anus. (From the old-fashioned practice of using dried corncobs instead of toilet paper in outdoor privies)
2006, The Grapple: Settling Accounts, Book Three :He'd just sent away two more guards from the women's side for having lesbian affairs with the prisoners, and one male guard who'd got caught cornholing colored boys.