Sandwich

Ham, dried tongue, or some other salted meat, cut thin and put between two slices of bread and butter: said to be a favourite morsel with the Earl of Sandwich.
a human advertising medium, placed between two boards strapped, one on his breast the other on his shoulders. A “toad in the hole” is the term applied to the same individual when his person is confined by a four-sided box. A gentleman with a lady on each arm is sometimes called a sandwich. The French phrase for this kind of sandwich l'âne à deux pannières, is expressive.