Late 19th century; earliest use found in Littell's Living Age. From nid-nod + -ing early 19th century; earliest use found in Susan Ferrier (1782–1854), novelist. From nid-nod + -ing.
Definition of nid-nodding in US English:
nid-nodding
nounˈnɪdnɒdɪŋ
The action of nid-nod; repeated nodding.
adjectiveˈnɪdnɒdɪŋ
That nods repeatedly.
Origin
Late 19th century; earliest use found in Littell's Living Age. From nid-nod + -ing<br>early 19th century; earliest use found in Susan Ferrier (1782–1854), novelist. From nid-nod + -ing.