This weeks fun phrase is “Backseat driver”
Meaning: Someone who gives orders when he or she is not in charge.
History: Today’s backseat driver is most likely to be in the front, alongside the real driver, but in the early days of motoring it was not unusual for the driver (often a chauffeur) to be in the front seat and the passengers in the back seat. I would date the expression to the 1920’s. Strangely the brash back-seat driver is quite in contrast with the shy or self-effacing person who , in the much older phrase, “takes a back seat.”