Idiom Definition:
Your browser does not support the audio element.
"to ride shotgun"
to travel in the front passenger seat (next to the driver) of a moving vehicle
to assist or help
Synonyms:
abet, aid, back, collaborate, cooperate, facilitate, help, navigate, passenger, serve, support
We see a man carrying a whip. He is driving the stagecoach. The other man is sitting in the passenger seat. He is carrying a shotgun. This man is
riding shotgun. This is the origin of this idiom.