A New Broom Sweeps Clean – A fresh leader gets rid of the old and brings in new ideas and personnel. This term can be found in English as early as 1546 in John Heywood’s proverb collection.
Climb/jump on the Bandwagon – Join a growing movement in support of someone or something, often just as that movement appears to have become successful. This phrase developed after American politicians in the late 19th century began using bandwagons when campaigning for office.
First known use: 1899 by President Theodore Roosevelt: “When I once became sure of one majority they tumbled over each other to get aboard the band wagon.”
Familiarity Breeds Contempt – The better you know someone, the more likely you are to find fault with them. First known use: 1386 in Chaucer’s “Tale of Melibee.”
The Grass is Always Greener on the Other Side – A different situation always seems better than your own. First known use: 1400s.
You Can’t Teach an Old Dog New Tricks – Old dogs (and people) learn less well than the young. Although this phrase primarily refers to people, not products, it nevertheless shows how Americans tend to view old things as outdated and unadaptable. First known use: John Fitzherbert’s 1534 “The Boke of Husbandry.”