Yep, that can happen. Our words data is a snapshot of words known to Wiktionary at a given point in time. However, as grows the language, so does Wiktionary, and it may happen that we don’t know of a new-arrival word in English that Wiktionary knows about, and yes, it can happen that you were unlucky enough and got that particular word offered as a fake one. If this is the case, contact us and let us know. We’ll get it fixed, and you’ll get the bragging rights!