'Caterwomtious' is also a Sussex word meaning disordered, untidy, disruptive. 'Caterwise' is another, closer to Sorcha's explanation. I wondered if it might be a nursery word from the children's book 'Katawampus, Its Treatment and Cure', by Edward Abbot Parry, 1895.

On the other hand, Parry might have been making use of an existing word. The Greek beginning and Latin ending make it sound as if it's a joke word for a medical condition.

Valmai (Lewes, Sussex, England)