It was a subtle NOD to a book
called Stand on Zanzibar,
Westworld Season 3, Episode 8
She asked me a question.
I should probably NOD.
The Big Bang Theory Season 1, Episode 2
You don't have to whisper,
you can just NOD your head.
The Big Bang Theory Season 11, Episode 9
Just NOD and smile, he's almost gone.
The Big Bang Theory Season 10, Episode 4
Dad, you NOD off quickly.
Money Heist Season 1, Episode 9