Of sealing, said when one's ship and crew are in the midst of the main herd of seals. "Burned down in the fat" was said of the old steamships when a ship was "parked" in the main herd.
"Father gave me a sign this evening that there's plenty of swiles over there just as I said." "Yah! Looks like they're burned down in the fat, Cap'n." --Cassie Brown with Harold Horwood, Death on the Ice: The Great Newfoundland Sealing Disaster of 1914, Doubleday Canada, 1972.