A large number of English colloquialisms from various periods are American in origin; some have lost their American flavor (from OK and cool to nerd and 24/7), while others have not (have a nice day, for sure); many are now distinctly old-fashioned (swell, groovy).
Velik broj engleskih kolokvijalizama iz različitih razdoblja su američki porijekla; neki su izgubili američki okus (od OK i cool do nerd i 24/7), drugi nemaju (imaju lijep dan, zasigurno); mnogi su sada izrazito staromodni (uzburkani, groovy).