Entry in the Encyclopedia of Mythological Beings
Llamia
(plural: llamiae)
The llamia of Greco-Andean mythology was a fearsome monster with the head and breasts of a woman, and the lower body of a South American pack animal. The llamiae would lure children and young men into the midst of the herd and enslave them. The luckless victims would be forced to spin the extra-soft llamia wool into into charming ethnic sweaters for the rest of their miserable existance.
The Piňata: a brightly coloured beast that can fly at low levels (like ceiling height), usually covered with feather-like quills. When attacked with a sword, it spews a spray of sugary, poisonous beads at its attackers.
I was going to write up a description of the Sphinxter, but, really … it’s better left to the imagination.
The Sphinxter! Sphinx-o-rama! Telling riddles! The Sphinxmeister!
Or were you going to go in a different direction with that?
[In case you’re wondering where I come up with these things… last night, my roomate was looking up the pronounciation of “lamia”, and she asked me to check her spelling. Guess how she wrote it?]
The Gorgonzola – a cheese with a smell that will petrify you
Or this:
http://store.perspicuity.com/sections/Products/Gorgon.sized.jpg
Go-Golem
A mythical being in Jewish folklore. The first one was alleged to be made by a rabbi in Prague to entertain patrons of his brother’s dance club. Created from inanimate materials, they are nonetheless able to move around, usually in a dancing motion. Go-Golems respond to their creator’s commands, but only when they are written down and tucked into its thigh-high boots.
(What about the You-Suck-ubus? A creation of our modern heckling ways? Or the Win-otaur, a being that’s 1/2 bull and 1/2 pure win. I think with some Photoshopping, that one could be a meme. I’m no good at the biographies, obviously. 
)
The Ballandchain, a creature which attaches itself to most men and women when they reach adulthood. Though the meeting of the human and the Ballandchain is initially joyful, with time the joy may wear thin. The female Ballandchain often metamophs into a shrill nagging harpy, expanding in middle age. The male also grows larger and can lose its hair or libido or both. Every man and woman with a Ballandchain in captivity thinks his neighbor’s is better looking… If a human is lucky, on his/her 50th anniversary he/she is sent on a cruise with his/her Ballandchain by his/her loving children to celebrate. If unlucky, the Ballandchain is sent into exile and often attempts to attach itself to another man/woman. ( The female can often be found attending community college part-time. The male can be spotted picking up a sub sandwich at a deli on Sunday nights after visiting its offspring.)
The Commentataur- a creature that only exists from the chest up yet talks constantly and believes itself to be an expert on all topics.
**HIPPOGRIFF, n. **
An animal (now extinct) which was half horse and half griffin. The griffin was itself a compound creature, half lion and half eagle. The hippogriff was actually, therefore, a one-quarter eagle, which is two dollars and fifty cents in gold. The study of zoology is full of surprises.
– The Devil’s Dictionary, by Ambrose Bierce
The Moozes - a set of nine cows who embody the arts and inspire the creation process with their gentle lowing and swishing of tails.
The Erymanthean Bore
This creature liked to hang out on the slopes of Mount Erymanthos, hiding behind boulders and smoking high quality dope. He would stop passers-by and engage them in interminable discussions as to why the music of Euterpe had better production values than the choral poetry of Polyhymnia. Generally, his audience listened for half an hour then jumped off a cliff.
Cyrus: God of country music.
Hermorphoditos: God of internet porn.
A non-Greek one:
The Obamanable Snowman- This charismatic creature is large, hairy, and persuasive. Differentiated from the other yeti by its dark hide and eloquent speech patterns, the dominant Obamanable Snowman yearns to be the leader of its pack. Obamanable Snowmen have been spotted in a wide variety of habitats, but many of the reports are considered unreliable, leading to controversy over the Snowman’s exact origins.
The Lack Mess Monster–a giant, semi-dinosaurian creature, who cannot find a military cafeteria, no matter how hard it tries.
I’m still giggling at this.
Herpes
He flew around on his wingèd thongs, carrying the head of the Gorgon Chlamydia. Her scalp was covered with writhing crabs and one glance at her awful face caused the beholder to instantly turn to pus.
A fellow at a D&D board homebrewed up stats for the Eunuchorn, a waist-high creature which results when the purity of a unicorn is defiled. Being born of sexual misconduct, it attempts to gain revenge upon the world by using its sharp horn to render all creatures it meets incapable of such misconduct.
Castor and Bollux
After creating the world’s first ever batch of fine sugar, they roamed the world spouting conspiracy theories (such as the idea that the Greeks didn’t really build a wooden horse) to whoever they met.