The exact origin of the name "Sloppy Joe" for the sandwich is not entirely clear, as there are a few different theories. One popular theory suggests that the term "Sloppy Joe" originated in the early 20th century in the United States, specifically in the Midwest. It is believed to be named after a cook or a bar owner named Joe who created the sandwich. The sandwich's loose and messy nature, with the sauce and filling spilling out, led to the name "sloppy." Over time, the name "Sloppy Joe" became associated with this particular type of sandwich, which consists of a filling, often made with ground beef in a tangy sauce, served on a bun.