Blubber, the fat of the whale and other aquatic animals. It lies immediately under the shin. In the porpoise it is firm, fibrous, and about an inch thick; in the whale, it is commonly six inches in thickness. Formerly, the blubber was boiled down into train-oil on the shores of Greenland, and other places, where the whales were caught; but it is now brought home in casks, and undergoes that process in Britain. The quantity, of blubber yielded by a whale is forty, fifty, nay sometimes, eighty, hundred weight.