blub·ber 2 
(blŭbər)
(blŭbər)n.
1. The thick layer of fat between the skin and the muscle layers of whales and other marine mammals, from which an oil is obtained.
2. Excessive body fat.
3. Any of various large jellyfishes.
adj.
Swollen and protruding: blubber cheeks.
[Middle English bluber, foam.]
blubber·y adj.