The tramezzino is a usually triangular sandwich constructed from two slices of soft white bread, with the crusts removed. Tramezzini are popular and inexpensive snack sandwiches available at many Italian bars throughout the day. Popular fillings include tuna, olive, and prosciutto, but many other fillings can be used.
The word tramezzino was invented by Gabriele D'Annunzio as a replacement for the English word "sandwich". Tramezzino is the diminutive of the word tramezzo with the addition of the suffix -ino, meant as a half-way between breakfast and lunch, where to eat a break-hungry snack.
Tramezzini are also sold in Hungary pre-packaged at railway and subway stations, and are a popular food choice of commuters.