If you're only familiar with Chris Cooper's work with Deerhoof, Fat Worm of Error or even bits of his duos with Bill Nace then this may come as a bit of a shock.
Both Deerhoof & Fat Worm, while loose, are certainly aren't formless and some of the duos with Bill Nace tend to become guitar noise extravaganzas.
I'm honestly at a bit of a loss to describe this. Much of this wouldn't be out of a place on a sun damaged Ashtray tape from the mid-90's or a Bananafish comp [which, if i'm not mistaken, it was].
The lp he did for Ultra Eczema [look out for an upload soon] is a bit more in line with Fat Worm's weirder shit with just a dash of early 70's Residents thrown in for good measure. That's probably a easier place to start if you haven't listened to much in the way of 90's noise.