Definition of head-shaking in US English:

head-shaking

adjective

  • Engaged in shaking one's head, especially to express disapproval, disagreement, sorrow, etc.; (hence) having a negative or disapproving attitude.

Origin

Early 17th century; earliest use found in Thomas May (d. 1650), writer and historian. From head + shaking.

Pronunciation

head-shaking

/ˈhɛdˌʃeɪkɪŋ/