butter-and-eggs trot, n. — 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 jog-trot pace on horseback.

c.1786		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 .
1788, 1796		Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn).
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1843		R.S. Surtees Handley Cross (1854) 406: A couple of hours steady butter and eggs bumping.
1846		Exeter & Plymouth Gaz. 28 Mar. 2/1: [D]oing the butter and eggs trot pon an ole horse going tu market.
1888		Rugby Advertiser 19 May 3/3: He found on mounting his horse that, to use an old expression, he was only able to proceed at ‘a butter and eggs trot’.