"Ride shotgun" is a popular phrase that refers to sitting in the front passenger seat of a vehicle. However, there are many different synonyms that can be used to convey the same concept. For example, "copilot" can be used to describe the person sitting in the front seat, while "shotgun rider" is another common phrase. Other options include "navigating companion," "front-seat passenger," and "co-piloting partner." These synonyms all refer to the same concept of sitting in the front seat of a car or other vehicle, but they add a bit of variety to the language used to describe the activity.