If you have a hunch about something, you are sure that it is correct or true, even though you do not have any proof. I had a hunch that Susan and I would work well together
A strong, intuitive impression that something will happen; said to be from the gambler's superstition that it brings luck to touch the hump of a hunchback
If you hunch your shoulders, you raise them and lean forwards slightly. Wes hunched his shoulders and leaned forward on the edge of the counter. if you have a hunch that something is true or will happen, you feel that it is true or will happen suspicion have a hunch (that)
If you hunch forward, you raise your shoulders, put your head down, and lean forwards, often because you are cold, ill, or unhappy. He got out his map of Yorkshire and hunched over it to read the small print