This whale is not dead; he is only dispirited; out of sorts, perhaps; hypochondriac; and so supine, that the hinges of his jaw have relaxed, leaving him there in that ungainly sort of plight, a reproach to all his tribe, who must, no doubt, imprecate lock-jaws upon him.
There are no more uses of "ungainly" in the book.
Show samples from other sources
At that she flung her head high, spun on her ungainly legs and gallumphed back down the ridge apparently more indignant than afraid.
Farley Mowat -- Never Cry Wolf
We struggle with the ungainly thing, making all kinds of clanking noises as we wobble down the stairs.