means a strong intuitive feeling or guess about something, formed without conscious reasoning or hard evidence.

from From the verb 'hunch,' meaning to push, shove, or hump up into a curve — origin uncertain, but in use by the 16th–17th centuries. The bodily sense of a 'hunch' (a thrust or a humped back) came first; the mental sense — a feeling that nudges you — is a much later American twist from the 1800s. The popular story is that gamblers thought touching a hunchback's hump brought luck, so a 'hunch' became a tip from fortune; that's a charming tale but unproven. More likely your brain simply borrowed the idea of an inward shove.