Desu

The one word that every real Japanese person will go insane if you keep on saying it to them, mainly standing for 'it is' to go at the end of a sentence became a big meme of annoying weaboo or otaku. If you're wondering why it goes at the end of the sentence it's because in Japanese sentences are formed differently. It is said in a motivational Poster that if you keep on typing Desu, you will turn Japanese, people believed that, and that's now what you will constantly hear from people who want to prove they're Japanese, also see kawaii for another annoying weaboo term.