Encountered online over the past few years. There I was reading along in American and these words popped up as if they were ordinary, as if they would make sense and would work, so I wrote them down to make fun of them but never to actually use them. As you can see that would be ridiculous.
It's a big group and they're all useless.
* MacGuffin: a plot element that catches the viewers' attention or drives the plot of a work of fiction". The defining aspect of a MacGuffin is that the major players in the story are (at least initially willing to do and sacrifice almost anything to obtain it, regardless of what the MacGuffin actually is. In fact, the specific nature of the MacGuffin may be ambiguous, undefined, generic, left open to interpretation or otherwise completely unimportant to the plot. Common examples are money, victory, glory, survival, a source of power, or a potential threat, or it may simply be something entirely unexplained.
* Maedads: the female followers of Dionysus and the most significant members of the Thiasus, the god's retinue. Their name literally translates as "raving ones."
* majuscules: A large letter
* malapert: boldly disrespectful to a person of higher standing.
* malletie: French, a Trunk-Maker, or manufacturer of luggage and suitcases.