have a hunch (that something is the case)
and have a hunch about somethingto have an idea about what did, will, or should happen; to have a feeling that something will or should happen. I had a hunch that you would be here when I arrived. I have a hunch about the way things will happen.
hunch over
[for someone] to bend over. The wounded man hunched over and staggered to the window. He was hunched over with pain.
hunch something up
to raise up or lift up some body part, usually the shoulders. He hunched his shoulders up in his effort to get warm. He hunched up his shoulders to keep warm.
hunch up
to squeeze or pull the parts of one's body together. He hunched up in a corner to keep warm. Why is that child hunched up in the corner?