Meaning

noun an impression that something might be the case

noun the act of bending yourself into a humped position

verb round one's back by bending forward and drawing the shoulders forward

originAssibilated variant of hunk, of uncertain origin. Alternatively, a derivative of hump, via an earlier Middle English *hunche, *humpchin, from *hump + -chin, -chen (diminutive suffix), equivalent to hump + -kin. In the sense of an intuitive impression, said to be from the old gambling superstition that it brings luck to touch the hump of a hunchback.

Etymology from Wiktionary, CC BY-SA 3.0