Remember that OCD is a very broad term – it means exactly what it says, and the disorder describes the symptoms. An individual has come to associate performing a specific or category of acts or tasks (the compulsion) with relief from repetitive bad, destructive, and even catastrophic thoughts (the obsession). Something that is often pointless or useless has become associated with the possibility of something completely unrelated to it in many cases, but somethings the connection is much more clear. In terms of hand washing, it is often attached to thoughts that were once rational (I should clean my hands when they’re dirty because I might catch something if I don’t) and now hyperbolized (If I DON’T wash my hands for exactly this long or AT LEAST this long at this temperature in this way I will catch AIDS and spread it to my entire family). OCD is in many ways like an addiction – you have fear and anxiety, and doing this thing helps you deal with that for right now but, because you have to do it more and more it starts to take over your life so that your life becomes about doing this thing, and now that, not the fear or anxiety, is the problem.
As mentioned by others, OCD is not about cleanliness – it’s a severe and inappropriate expression of anxiety relief that can take any form. But if they are about “uncleanliness” – hoarding for example, they are not about an obsession with the opposite of order. There is a logic to the hoarders’ thinking – it unfortunately is particular to the hoarder, and objectively damaging. Some of the common associations are if they get rid of something, that’s wasteful; they might need it; that they will forget about the memory associated with the thing if they don’t have it; and even comes from an outgrowth of obsessive perfectionism (well, that’s in the wrong place, so because I can’t do it right, I’m not doing anything). Hoarding much of the time, much like all other OCD-type disorders, is a dis-order not because of a need for an opposite of order, but rather because the victim is so obsessed with maintaining order they have found one particular way that they think helps them do that that they exclude most others and stop seeing the negative results of the action. If they aren’t able to do this particular thing, they lose control of their emotions because to them they are losing control of their lives.
This is why they are disorders, and also why it’s difficult to have a dis-order disorder. Dis- generally indicates something separate, apart, different or doubled, not opposite. These are disorders because they are idiosyncratic ways the victims create order in their lives – it is order to them but disorder to the average third-party viewer. So technically, if we take the basic definitions, we get the amusing result that we ALL have a disorder disorder (it becomes a double negative). Something that might be close to what you’re thinking would be severe procrastination, which would lead to an unintended disorder, and other associated organizational issues. Politically, you’re talking about anarchists in a way. You have to think more in the “a-” prefix category to get at the things you’re talking about.
But really I think the closest thing to what you want to get at is someone who is apathetic about cleanliness, order, etc. Who just doesn’t care and lets it all go to shit. Medically, the appropriate term for those people is “slacker leeches.” :-)