Gamp is an eponym from Mrs. Sarah Gamp, a character in Dickens's 'Martin Chuzzlewit' (1843) noted for her large, untidy cotton umbrella. The etymological value lies in the continuity between the older named form and the modern English word, even where no further internal segmentation is supplied. In present use, it is used as a noun meaning "a large, baggy umbrella", so the historical material remains connected with the current sense rather than standing as bare ancestry. Its semantic neighborhood includes umbrella, brolly, and parasol, locating the modern specialization without adding a new origin story.