head|shak|ing «HEHD SHAY kihng», noun.
1. the act of shaking one's head; headshake: »
My only means of communication were paper and pen and pencil, and such weak natural adjuncts as nods [and] headshakings (New Yorker).
2. an expression of doubt, disbelief, or other negative feeling: »
Macaulay is neither the first nor will he be the last to indulge in headshaking about democracy as a political system (Wall Street Journal).
Useful english dictionary. 2012.