shitcunt

either someone who is shit at being a cunt, or a cunty person who is just a complete cunt. Every attempt at describing a shitcunt succeeds only in describing someone slightly less cunty - in essence, the infinite cunt. A contemptible cunt more cunty than you can imagine, ever.

can also be used to describe a lady suffering from rectal incontinence, literally her cunt is shitty.

eg My neighbour, ex and daughters boyfriend are all fucking shitcunts
fancy a pint shitcunt. (this is generally considered banter)

I've done a shit in my panties and it's gone right through - I've got a shitcunt!