Assisting in the direction of travel by harping, yelling and otherwise being annoying.
I hate going on long trips with my husband; he's the worst sort of nagivater.
5π 3π
Abbreviated term for what a backseat driver does. Nag + navigate, mixed-up a bit.
"I know where I'm going. I don't need you to nagivate me."
4π 3π
While one is assisting in the navigation process, they are simultaneously nagging the pilot.
My wife really loves to nagivate while weβre on road trips.