Blue plate special意思

"Blue plate special" is a term used in the United States to refer to a low-priced meal offered in a restaurant, typically for a limited time or as a daily special. The term originated in the early 20th century and was used to describe a meal served on a blue plate to indicate that it was a special offer. The blue plate special often includes a main course, side dishes, and sometimes a drink, and it is meant to be a hearty and satisfying meal at a budget-friendly price.