Okay, so, in America, if people want to "imitate" an English accent they'll probably say something like, "Cheerio, old mate. Would you care for a spot of tea?" Or, an Australian accent is often done involving the phrase "shrimp on the barbie." My question is if a Londoner, or anyone from England really, were to affect an American accent, are there any phrases that they would most likely use, that are deemed distinctly American?
I've tried googling phrases like "cliched American expression" "stereotypical American accent expression" but I wasn't finding anything too useful. I also think it would be better to get actual personal experience.