The Collaborative International Dictionary of English v.0.48:

Speck \Speck\, n. [Cf. Icel. spik blubber, AS. spic, D. spek, G.
   speck.]
   The blubber of whales or other marine mammals; also, the fat
   of the hippopotamus.
   [1913 Webster]

   Speck falls (Naut.), falls or ropes rove through blocks for
      hoisting the blubber and bone of whales on board a whaling
      vessel.
      [1913 Webster]