|xθu’ lu|, more or less. It occurs to me that the “lh” is perhaps meant to be voiceless.
Silence! Do not use your eldritch runes here or you’ll doom us all!
I don’t know where you can get a shirt like that, but I do know where you can get a plush Cthulhu.
The “Super-Om” shirt? Yeah, I was looking for one as well.
http://www.studiotees.com/super-om-indian-funny-t-shirt-p-1408.html was about the closest I found, but Eben’s looks cooler.
So do you guys actually have a vowel in chthonic, too? Or is the first syllable entirely voiceless?
Also, I don’t think a voiceless [l] makes sense. Part of the sound will wind up voiced, or you will be unable to hear it as an [l] at all.
I recall hearing somewhere that the first syllable is meant to be pronounced somewhat akin to a dog barking. Not that that’s easy, but you know, saying his name CORRECTLY perhaps isn’t the greatest idea and all.
I’ll see your throatwarblermangrove and raise you a fershlugginer potrzebie! 
Cthulhu is badly misunderstood, he’s really a stand up guy most of the time. It’s just all these blithering idiots who can’t pronounce his name correctly that sends him into a rage.
Cease your attempts at Vogon Poetry immediately, or I shall tell you to cease again!
And that summons nameless horrors from eras ancient when Man was new to consume the souls opf the dancers. Yes, that’s just about it.
Obviously you don’t watch South Park. They just had a whole Cthulu episode. Here’s a touching clip of Cartman and his new best friend.
I pronounce it ‘kuh-THOO-loo.’
Why is everyone skipping the last h? I can’t see how you guys are getting to where you’re getting. It’s clearly K-thul-hoo. The middle syllable is like the “hull” of a ship, but with a theta instead. The last syllable is exactly like “who”.
Why is it unanimous so far that the l and h go together?
See post No. 14.
I also pronounce the second H
Got mine from ThinkGeek. 
That was exactly the information I needed to track one down. Thanks!
The thing is, if you say it fast, the last H will be barely audible even if you try to pronounce it. Give it a shot, you’ll see what I mean.
ETA: Good god, wait - you live near me, don’t you? DON’T GIVE IT A SHOT! DON’T!
From Lovecraft’s letters to friends:
He apparently told other, different things to other people over the years.
When I worked as a slush pile reader at Weird Tales, I was told the proper way was to make a Klootl Klootl noise in the back of your throat. If you can’t trust the editors of Weird Tales about this, who can you trust?
Elder Gods? Please… merely a Great Old One… I mean Elder Gods are like Nodens or Hypnos… or if we’re going to include Outer Gods then Azathoth, or Yog-Sothoth, or Nyarlathote… eep