Green’s Dictionary of Slang

a drink consisting of the dregs collected from the overflow from the pouring taps, the ends of spirit bottles and similar leavings; it was sold cheaply in gin shops, particularly to women.

1823		‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc. 3: All sorts, or All Nations — spirits compounded of all the drippers in a cellar, and the pewter save-all on a gin-shop counter.
1859		G.A. Sala Gaslight and Daylight 72: A counter perforated [...] for the purpose of allowing the drainings, overflowings, and out-spillings [...] to drop through, which, being collected with sundry washings, and a dash, perhaps, of fresh material, is [...] dispensed under the title of all ‘sorts.’.