His name is unpronounceable by human mouths.
A rough description of Cthulhu goes as:
A pulpy, tentacled head surmounted a grotesque and scaly body with rudimentary wings ... It represented a monster of vaguely anthropoid outline, but with an octopus-like head whose face was a mass of feelers, a scaly, rubbery-looking body, prodigious claws on hind and fore feet, and long, narrow wings behind. This thing, which seemed instinct with a fearsome and unnatural malignancy, was of a somewhat bloated corpulence ...
While psychicly sensitive humans have been contacted by Cthulhu through telepathy (which is assumed to be the "language" of the Old Ones), the only reported sighting by a human in recorded history occured on March 23, 1925. This was twenty-two days after R'lyeh rose above the water, only to sink once more shortly after when the merciful stars' shifting position caused Cthulhu to resume his death (the conditions required for R'lyeh to rise are also required for the Old Ones to live). This was reported by Gusaf Johansen, the only remaining crew member of the Emma. He later died under mysterious circumstances in his hometown of Oslo.
Cthulhu is described as resembling a green humanoid with draconian wings, and a head resembling an octopus (though it is believed Cthulhu is not composed of matter. While it is a common misconception that Cthulhu is evil, it is worth noting that he/it appears to be amoral, viewing humans as pests (akin to human views and actions with insects).
For some reason, Cthulhu along with the other Great Old Ones have been sealed away, and is said that Cthulhu one day will awaken and release the Great Old Ones and they will resume the rule of Earth, and there will be a "Holocaust of freedom and ecstasy". the Great Old Ones telepathically talked with the earliest humans, and started the infamous Cult of Cthulhu.
many real life cults have been started and can be found on the internet. I'm not sure which scares me more, the Cthulhu cults, or the other religions.
I had a nightmare about Cthulhu last night
There are nut jobs out there, REALLY OUT THERE that worship it.
I find the concept of Cthulhu, and the cults....a little freaky.
I found a Cthulhu based board game...<- this is really true.
Cloverfield was mistaken for a Cthulhu movie.
Less a god than a monstrous horror resembling an octopus, man, and dragon cojoined from a creation wholy unlike birth.
Best pronounced sucking water into your lungs whilst beining dragged down by a tentical.
Anyone shewn Cthulhu, sometimes even in representations fearfully crafted by his cults, cannot survive sane.