Joe Keller means in slang: A technique of sharing an alcoholic beverage, typically a beer, from one person to another until it is completed. This term is based on Joe Keller, a Wisconsinite who took a break while working in the fields and discovered that there were more friends than beer in his cooler. Joe Keller took one beer at a time and gave it to his friends, so everyone got the exact same beer. Joe Keller suggested that you find someone to drink with next time you are drinking. Sharing is caring especially when it comes to getting drunk. (in Slang Dictionary, added by Jaden Sweeney)