The term "shotgun" is pretty dated these days. I think the updated term would be something like "machine gun" or "Uzi" . The passenger uses a machine gun when doing drive-bys. More seriously though, changing the term is a case of political correctness worrying about terminology instead of trying to take real action to reduce gun violence. Instead of trying to address the root causes of violence like poor mental health care, poverty, drugs, influence in the media(movies, video-games, music), ease of access to guns, a culture of bullying, racism, & religious discrimination. Changing the slang term "shutgun" to another term for front seat will be as effective as having a moment of silence after every mass shooting.