Definition of shake one's head in English English dictionary
To move one's head from side to side, in a repeated swiveling motion from the neck, to indicate disagreement, negation, disbelief, or dismay
Mr. Brandon shook his head in despair at the unbusinesslike methods of his patron.
To move one's head up and down, in a repeated hinge-like motion from the top of the spine, to indicate agreement, affirmation, approval, or simply polite attentiveness
She listened with care, shaking her head in agreement from time to time.