gamp definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Brit. a large umbrella, esp. one that is bulky or awkwardly wrapped
Origin: in allusion to the umbrella of Mrs. Gamp in Dickens' Martin Chuzzlewit
gamp definition by American Heritage Dictionary
noun Chiefly British
A large baggy umbrella.
Origin: After the umbrella of Mrs. Sarah Gamp, a character in the novel Martin Chuzzlewit by Charles Dickens.