Definition of nid-nod in English:

nid-nod

verb

Scottish
  • To nod repeatedly, especially as a sign of drowsiness.

Origin

Early 19th century; earliest use found in James Hogg (d. 1835), poet and novelist. Reduplication (with vowel variation) of nod.

Pronunciation

nid-nod

/ˈnɪdnɒd/