hasty pudding, n.² — Green’s Dictionary of Slang

hasty pudding n.²

[SE hasty pudding, a pudding made of flour stirred into boiling milk or water to the consistency of a thick batter]

a muddy road.

c.1786		Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: Hasty Pudding. [...] Figuratively, a wet, muddy road: as, The way through Wandsworth is quite a Hasty Pudding.
1788, 1796		Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn).
1811		Lex. Balatronicum.