Shoat: a young hog and especially one that has been weaned.
http://www.merriam-webster.com/dictionary/shoat
Used in “Beloved” on page 190 on the top of the page.
Did you steal that shoat? You stole that shoat.
Schoolteacher was asking Sixto whether he stole an animal. I did not think that was another word that could be used to describe a hog.
