Americanism or not, "staycation" is here to stay. I've come across it about ten times over the last couple of days. Perhaps Americans passed it on to us without suffering it themselves, like Typhoid Mary.

"Can I get a coffee?" is another. Take it back. Proper English is going "out the" window, as we never used to say, but do now.

Another annoying turn of phrase, perhaps a distant cousin of "I'm, like, duh?" is illustrated below:

And you know this how?

And this matters why?

And I should care because?

This could be Australian, in which language every sentence uttered by anyone under thirty is a question. It may even be British, in which case, try not to catch it.

Do Americans and Australians say "Bob's your uncle"? If not, they should.

For avoidance of doubt, annoying Americanisms generally annoy Americans too, so it's our fault for taking the worst of your language.