A Gud is a strange sister whoâs a bit of a pain in the butt. She will always force down your throat the three years and eight days she had on the earth before you. A Gud is someone who will drop a bowl of cereal on your head and trick her seven year old little sister into thinking thereâs an evil witch in a well with crows as spies. Over all though a Gud is a good sister to have and you should always love them forever.