"Orts" is a rare but tasty word. Orts are the bits of bones, gristle, stems, skins, pits and other inedibles that are left on the plate after one finishes eating -- the stuff that is scraped directly into the garbage can. Orts are to be distinguished from "leftovers" which are the uneaten remains of the meal that are carefully sequestered for tomorrow's breakfast. Leftovers good, orts bad.
Shakespeare uses "orts" twice in the plays, both times metaphorically. The first instance is in Julius Caesar, when Anthony tells Octavius how little he values his colleague Lepidus. According to Anthony, Lepidus is "A barren-spirited fellow; one that feeds/ On abjects, orts and imitations." In this instance, orts seems to be prompted by the word "feed." A second appearance of orts is in Troilus and Cressida. Troilus has discovered that his beloved Cressida has been playing at fast and loose with Diomedes: "The bonds of heaven are slipp'd, dissolved, and loosed/ And with another knot, five-finger-tied,/ The fractions of her faith, orts of her love,/ The fragments, scraps, the bits and greasy relics/ Of her o'er-eaten faith, are bound to Diomed." It's a strong speech and "orts of her love" is a powerful phrase, though rather obscure nowadays to audiences for whom the "ort" is a mystery, which is certainly all audiences.
Whether Shakespeare's first audiences would have required a footnote for orts I do not know. It was never a frequently used word, though the OED attests its presence in the language from 1440 to 1880. I don't know of any recent usages, but once, when I was at lunch with a group of professional Shakespeareans, I asked at the close of the meal, "What do we do with the orts" and everyone at the table knew exactly what I meant. Rather a specialized audience, however.
Orts should not be confused with Oorts. The Oort cloud is the presumed boundary of the solar system, way out there, ten times further than Neptune, where the comets are thought to reside until they are dislodged from their proper home and come hurtling toward the inner planets. Orts and Oorts are both leftovers, in the sense that they are the remains of an original creation, in the one case chicken pot pie and in the other the universe. Orts are much smaller but more palpable than Oorts. Makes a guy wonder what could possibly be denoted by ooorts. Or oooorts.