Nod of knowing: a nod between two people who acknowledge each other's existence with a gentle nod of knowing
by ShokLaRok March 14, 2017
When men guys acknowledge each other, without speaking or shaking hands, by a simple nod of the head.
"Did you know that guy back there?" "No, I just gave him a gentleman's nod because we made eye contact. It's just polite to acknowledge someone's existence."
by ShokLaRok September 10, 2007