A chip butty, chip cob, chip sandwich, chip barm, chip batch, chip roll, chip muffin, piece and chips or chip piece (in Scots) is a sandwich made with bread or a bread roll (usually white and buttered) and chips (French Fries), often with some sort of sauce such as tomato sauce e.g. ketchup, brown sauce or mayonnaise.
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 scallop butty, in which a battered slice of potato is used in place of chips. In the East Midlands a chip butty made with a bread roll is referred to as a "chip cob".