Why is Joe a Synonym for Coffee?

By Will Smith

Coffee has a passel of nicknames, but I've always wondered why it's called a cup of joe.

According to Quartz, the cuppa joe nickname for coffee comes to us courtesy of Josephus Daniels, a newspaperman turned Secretary of the Navy. I'm going to make you read the article to find out why though. I'll just say, it probably isn't a term of affection bestowed upon him by the sailors under his command. (via Conmused)