UK, 1820—to show willingness to enter into a contest or take up a challenge, especially in business or politics—originally (1804) used in boxing with reference to the custom of throwing a hat into the ring to signal willingness to enter a contest
USA, 1891—a passenger in the rear seat of a car who gives the driver unwanted advice; hence, figuratively, a person who is eager to advise without responsibility
USA, 1920—‘(as) American as apple pie’: typically American in character—‘apple pie’ being here a symbol of American motherhood and traditional family values