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
meaning: everything is or will turn out all right—Scotland, 1891—‘bob’ probably related to the adjectives ‘bob’ and ‘bobbish’, meaning ‘well, in good health and spirits’
British, 1925—‘to throw a spanner in(to) the works’: to cause disruption, to interfere with the smooth running of something—synonym (American English): ‘to throw a monkey wrench into’
meaning: ‘there is nothing to prevent someone or something from being successful’—from a late-19th-century metaphor specifically used of poker games with ‘a sky-high limit’ on stakes
meaning: ‘thoroughly dejected or disappointed’—appeared (1973) in Tyne and Wear (north-eastern England)—originated apparently in football parlance, in which it soon became a cliché
USA—‘to look, or to feel, (like) a million dollars’, or ‘(like) a million bucks’: to look, or to feel, extremely good, or extremely attractive (early 20th century)—sometimes used in contrast to ‘like thirty, or 30, cents’: cheap, worthless (late 19th century)
USA, 1910s—originated in horse racing: ‘under wraps’ is used of a horse that the rider is holding back and intentionally keeping from running at top speed—not from the wrapping placed over newly developed machines before their official launch