Hunched

To bend the top of one's body forward while raising one's shoulders.

"Don't hunch over your computer if you want to avoid neck problems."

To raise (one's shoulders) (while lowering one's head or bending the top of one's body forward); to curve (one's body) forward (sometimes followed by up).

"He hunched up his shoulders and stared down at the ground."

To walk (somewhere) while hunching one's shoulders.

To thrust a hump or protuberance out of (something); to crook, as the back.