Hunch
late 15th century: of unknown origin. The original meaning was ‘push, shove’ (noun and verb), a sense retained now in Scots as a noun, and in US dialect as a verb. Sense 1 of the noun derives probably from a US sense of the verb ‘nudge someone in order to draw attention to something’.
wiktionary
Assibilated 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.
etymonline
hunch (v.)
"raise or bend into a hump," 1650s; earlier "to push, thrust" (c. 1500), of unknown origin. Perhaps a variant of bunch (v.). Related: Hunched; hunching.
hunch (n.)
1620s, "a push, thrust," from hunch (v.) in its older sense. Figurative sense of "a hint, a tip" (a "push" toward a solution or answer), first recorded 1849, led to that of "premonition, presentiment" (1904).
