Won't Miss #331 - foreigners speaking Japanese to me

Occasionally, I have foreign friends over to my apartment for dinner or socializing. Though such friends are native speakers of English, they sometimes do something which is one of my pet peeves, and that is tossing in random Japanese words for things which are absolutely unrelated to Japan or Japanese things. I'm not talking about using the word "sushi" or even "chikatetsu" (subway) or