A chip butty, chip sandwich, chip barm, chip batch, chip roll, chip muffin, piece an chips or chip piece (in Scots) is a sandwich made with bread or a bread roll (usually white and buttered) and chips, often with some sort of sauce such as tomato sauce (i.e. ketchup) or brown sauce. The word butty is a contraction of "bread and butter" that came from northern England, perhaps Yorkshire or Liverpool.
The chip butty was originally considered a working-class meal and was served in pubs. Usually a meal is served with a round of bread so diners can assemble their own chip butty with leftover chips. The chip butty can be vegetarian-friendly if the chips are not fried in lard or dripping. One variation is the chip bap or barm, which uses a floury bap or barm cake instead of white sliced bread. Another variation frequently seen in the North is the scollop butty, in which the chips are battered before frying. In the East Midlands a chip butty made with a bread roll is referred to as a "chip cob".