Well, this is just straight up bloody ridiculous.
So, in the spirit of historic revisionism metasocioengineering (I love words like that, you can use them anywhere and no one will try to question it, it's like the intellectual equivalent of "promoting synergy"!)
Mandals: A Germanic tribe that unsuccessfully colonized what is now South Africa. Their entire tribe was wiped out when the now extinct South Africa Walrus (which they considered a deity) was afflicted by a rare strain of rabies, and developed an insatiable hunger for human flesh.
Murse: Slang for vampire. Believed to be coined from the Finnish "Mursu" (Walrus), due to the elongated fangs of these insidious creatures being mistaken for the tusks of the magnificent Walrus. (indeed, many Scandinavian monster hunters still mistake vampires for werewalruses, even in these modern times)
Mewlery: A juvenile quisling.
Meggings: The fragments of a roast dinner that inevitably get stuck to the bottom of the tin.
Marfists: (singular "Marfist") Followers of the religion of Marfology, the ritualistic worship of the now extinct South African Walrus.
Mantyhose: A firehose of exactly 4.5m length. Used mainly aboard merchant submarines.
Manties: Mispronunciation of "Manatees".
Mirts: From the acronym "Multiple Independent Re-entry Trowel". Generally considered the apex of atomic age gardening tools.
Meels: A portmanteau for "meals on wheels".
Now, go forth my minions to Urbandictionary! Spread the word! D=