What is "club sandwich"?

A club sandwich is a type of sandwich that is made with three slices of toasted bread that are layered with turkey or chicken, bacon, lettuce, tomato, and mayonnaise. The sandwich typically consists of two layers, with one layer of filling between the top two slices of bread and another layer of filling between the bottom two slices. The middle slice of bread is often toasted and spread with mayonnaise, and may also include additional ingredients such as cheese or avocado. The club sandwich is a popular lunchtime favorite at delis, cafes, and restaurants, and is often served with a side of french fries or potato chips.