The phrase "occasional nod" means to occasionally agree or acknowledge something by nodding one's head.
Sentences with «occasional nod»
It's a survival game loosely tied to the Metal Gear series, built on the Fox Engine and peppered with occasional nods, references, and ultimately bizarre connections to the core narrative. (cheatcc.com)
Due to his nervousness he didn't speak much, would only answer to the questions with occasional nodding. (resumejar.com)
A simple smile and the occasional nod will show that you're interested and engaged. (entrepreneur.com)