I'll add this into the guide later, but here's why Warmog's is a bad item on a main tank. Note I said main tank, rather than off-tank, or bruiser.

Warmog's gives you health and hp regen, with a nice little boost from the starting item after some creep kills, or champ kills. However, this does not contribute to anything else, making it an ineffective item for a character that is soaking damage, because there is no damage mitigation. Including it in a main tank build that has damage mitigation gimps that build, because a tank needs some ability to contribute to a teamfight besides being a damage soak (i.e. auras, effective and painful initiation, damage). This is augumented by a tank's ability to provide crowd control in a critical fashion (thus why Mundo is not a main tank, he doesn't have any serious CC, other than his anti-CC none of his skills scale off of AP/AD, and look at that, Warmog's is a core item for him). Randuin's Omen gives hp, a significant amount of armour, and an active that makes enemies running or chasing have a bit of a hard time. Sunfire Aegis gives you health, armour, and a passive damage aura to make it a tad more dangerous to be near you for an extended teamfight. Banshee's Veil gives you health, mana, and negates a skill strike on you every 45 seconds, sometimes a potentially fatal/crippling one. Aegis of the Legion gives you health, armour, magic resist, and a nice aura to boot. It would also be silly to not note that all of these items cost less than Warmog's Armor, including Randuin's (given that you build piecemeal and get the Heart of Gold early). This small list neglects to include items that provide health and damage, whether AP or AD.

In addition, most tanky build characters have strong health progression, so don't need the massive hp boost from something like Warmog's, instead do quite well with a scant 1k hp bonus total from getting two tank items that have health and something else on top of it.

Warmog's is a bad item in a general sense, due to the fact that almost all other full build items that are considered good give you at least three functions to them (exception being Rabadon's Deathcap, whose AP bonus and passive are both in high utility). For a main tank in particular (whose primary job is to support their team), it is not something you want to invest in, in either terms of cost-effectiveness, or general team utility. Look at it this way: Warmog's is an item that is 3k, with only 2 utility points of above average usefulness (high flat health and high health regen), compared to the roughly equivalent cost of Randuin's Omen, which offers *6* utility points, 3 of which have medium utility (*low flat health, armour, *low health regen, *5% CDR, on-hit chance to slow, activated AoE slow). And one of these days I'll need to make a chart on equivalent utilities, so this makes more sense. Note for now that the '*' indicates low utility bonuses.

Also, when you say HP tank, you're basically saying: Character that exists solely to take damage, and is actually pretty useless because they pose no serious threat to the enemy. The point of a main tank is that you *are* a serious threat, and are difficult to ignore as well as difficult to kill without a concerted effort. With my basic build, unless someone on their team is fed beyond all reason (i.e. full stacks on a Mejai's/Occult), it takes at least a 3 man focused effort with one carry(unless all of them have 40% armour/MR penetration, then it takes 2) to kill my fully munched Cho'gath, and that's with enough risk that the carry has a fairly high chance of dying if I can reach them, as well as a ~20 second time sink, sufficient for anyone on my team to get there if they aren't completely on the other side of the map (or to backdoor a turret), especially if I'm able to start kiting. A 'health tank' does not pose that kind of threat, and is easily countered by an AD carry with Madred's Bloodrazor, though typically just ignored. A proper main tank suffers from Madred's, but it would not pose such a hard threat because not only are you mitigating the damage taken from the passive with your MR, but you're also able to respond in a threatening manner, rather than either running like a little girl or beating your fists uselessly against a enemy that is taking your health away far faster than you can theirs.

And thanks for the info on the BBCode linking. I used this post to figure it out properly (and finally found the guide building help section).

one last thing the other type looks like this Cho'Gath

the cho'gath one was [,icon=cho'gath size=64,] without the comas

I haven't read your build all the way but I disagree on a point you made right at the start.
WHY ARE YUO HATING ON WARMOG'S?
it is such a great item that it gives 1370 hp is this a bad item for an hp tank? please give reasons that make sense
aslo the icons I just learned today and want to share, to get an image you go
[icon=(name of champ/item/mastery/rune)size=32 (a number from 16 to 64)
so cho'gath would be
to get a image in the text you write the name of it with and on either side.

A.
1. I did say the build was on a whim. I've been successful with it, but then, Cho is one of my main characters, so I screw around with his build for funsies.
2. It's a bruiser/nuke build, essentially, great for 3v3. Probably not so hot in 5v5, though I've yet to do badly with it.
3. Have you seen his AP ratios lately?
4. Have you feasted on a tank at 1/4 - 1/3 HP for a kill? With that amount of AP, Feast does ~1100 *true* damage.
5. Have you tried my build?

B.
Because while I know he can jungle (and have seen it done well), I haven't done it, I don't "know" it. I will keep it in mind to include such a guide in a later update, but my jungling experience has been... Kayle, on three occasions (two in actual games that I won, even). And that's actually it. I don't typically play jungling champs (haven't even touched Warwick or Nocturne). But I'll definitely look into it. I'll admit that I would expect people that jungle as Cho'gath to have prior experience with jungling and with Cho'gath himself, in other words be able to form a jungling strategy for him on the fly (as I did with Kayle). I could theory craft a probable jungling strategy, but I'd prefer to test it out first. It's also why I don't have the off-tank build up, because I haven't done that either.

**edited post for formatting**

A. AP Carry Cho isn't viable
B. Why is there no jungling build/guide!