Green’s Dictionary of Slang

human or other excrement; thus danna drag, a nightman’s or dustman’s cart; note var. in cit. 1803.

1803		Sporting Mag. Apr. XXII 54/1: An please your honour [...] for prigging a Jacob from a dunger-dan-ding-drag.’ [...] Prigging is to steal, a Jabob, is a ladder; and a dunger dan-ding-drag, a night cart.
1812		Vaux Vocab. of the Flash Lang.
1840		Flash Mirror 20: Peter Smutto [...] has entered his old flag of the Jacob and Drag, and he now does his business under the cognomen of the Bucket and Dunnaken.
1859		Hotten Dict. of Modern Sl. etc. 29: DANNA, human ordure [...] DANNA DRAG, a nightman’s or dustman’s cart.
1864, 1867, 1870		Hotten Sl. Dict. [as cit. 1859].
1873		Sl. Dict.
1895		Crowe Aus. Sl. Dict. 22: Danna, night-soil [...] Dannadrag, a night-cart.