It’s a Jeep thing, you would not understand
Every time my wife and I our out in my Jeep, she teases me about the famous Jeep wave. If you do not know what that is, when a Jeep passes another Jeep, the drivers wave. When she sees another one coming at us she braces for the wave, but after a few times, I catch her waving too.
Any yes, that is the Jeep from Popeye.