old sort noun a wife, a husband or any partner in a living-together relationship UK
[M]e an’ ‘im done time together. ‘Is old sort used to smuggle in the baccy for us, in her bra. — Bernard Dempsey and Kevin McNally, Lock,Stock... &TwoSips, p. 304, 2000
One old sort even asked me to kill her old man once. — Danny King, TheBurglarDiaries, p. 90, 2001