The position one takes when they have a sudden urge to run into the woods to take an enormous dump.
Jack suddenly ran off the third green into the woods to sasquat after eating "bad" sausage for breakfast.
The annoying person sitting next to or behind the driver of a vehicle that thinks they know more about how to drive and offers criticism and other driving tips.
When we go on a trip, I'm the driver and my wife is the nagivator.