Lagnappe: Cup of Joe

[Secretary of the Navy Joesphus] Daniels's only enduring contribution to the U.S. Navy was to abolish the rum ration in favor of free coffee. FDR supported this reform. To this day, navy chief petty officers call their coffee "a cup of Joe" for Josephus.

William J. Bennett, America: The Last Best Hope, vol. II

I had no idea. Now I'm going to enjoy that using that phrase even more. And I use it a lot.