Green’s Dictionary of Slang

butter-and-eggs trot n.

[based on the way market women make their way, carrying butter and eggs, into the weekly market]

a short jog-trot.

[UK]Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: Butter & Eggs Trot a Kind of Short Jogg Trot, such as is used by Women going to Market with butter and Eggs .
[UK]Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn).
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[UK]R.S. Surtees Handley Cross (1854) 406: A couple of hours steady butter and eggs bumping.