The demon who collects all the words skipped over or mutilated by priests in the performance of the services. These literary scraps or shreds he deposits in that pit which is said to be paved with “good intentions” never brought to effect. (Piers Plowman, p. 547; Townley Mysteries, pp. 310, 319; etc.).
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894