leg-of-mutton 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.
shaped somewhat like a leg of mutton; specif., designating a sleeve that puffs out toward the shoulder
leg-of-mutton definition by American Heritage Dictionary
Resembling a leg of mutton in shape; tapering sharply from one large end to a point or smaller end, as a sleeve or sail.