hunch over
1. To lean forward and round the spine rather than standing erect. A: "Would you stop hunching over like that?" B: "Ugh, but my back hurts, Mom."
2. To lean over something (specified after "over") and round the spine, rather than sitting or standing erect. I know, my posture is terrible after years of hunching over a computer keyboard.
hunch over
[for someone] to bend over. The wounded man hunched over and staggered to the window. He was hunched over with pain.