That bird who's hanging' out with you is mad like cat piss / Like bread and jam, or a knife going with butter / Face it son, your missus is a nutter!2005, “Your Missus Is A Nutter”, performed by Goldie Lookin Chain:
When I asked Mr Robinson why he'd made his own attempts, he said, 'It gets to be a bug. And I suppose I'm a nutter.'2012, Andrew Martin, Underground Overground: A passenger's history of the Tube, Profile Books, →ISBN, page 268:
Nut Butter (Table Nutter) is also recommended.1907, Reuben Swinburne Clymer, The International System of Direct Medication, page 223:
Among the miscellaneous articles examined, 27 samples of vegetable fat resembling lard were purchased for analysis under the various names of nut lard, nut butter, nutter, palmine, &c. These were passed as genuine.1910, Great Britain. Local Government Board, Annual Report, number 39, page xci: