1. A small scrap or fragment of food.
2. A remainder of a meal or sacrifice.
3. A bit left over from a farm animal's meal.
This word is usually used in the plural (orts).
Etymology: from Middle English orte, food left by an animal. The word was first used in English in the 1400s, and is still in use today. It's still most often used in reference to the eating habits of livestock.
The phrase "orts, scraps, and fragments" appears repeatedly in Between the Acts (Virginia Woolf's final novel).
An 1843 volume of The American Agriculturist claims "The orts of sheep are sometimes found to possess medical virtues for other stock".
"To make orts of good hay." - saying from 1800s or earlier.