Ticket Pocket (n.): Is a small pocket (jetted or flapped) on the outside of a suit jacket traditionally located above the right main pocket.
Traditionally, a distinctly British detail, the ticket pocket owes most of its popularity to the early days of train travel in the UK. As suggested by many historical references many city workers and other commuters needed a pocket that provided easy access to their train tickets- seems logical enough to want a ticket pocket to hold your ticket. However, upon further investigation and a few google searches later we discovered that the ticket pocket actually predates this popular myth.