Green’s Dictionary of Slang

1. a walker, a pedestrian.

a.1790		H.T. Potter New Dict. Cant (1795) n.p.: town todlers silly fellows, frequently taken-in by sharpers playing at different games.
1819		P. Egan Key to the Picture of the Fancy going to a Fight 18: The Toddlers are chevying him [i.e. a dandy on horseback] in prime twig.
1821		‘An Amateur’ Real Life in London I 559: I’m d—d if he was not up to slum, and he whiddied their wattles with the velvet, and floored the town toddlers easy enough.
1824		Annals of Sporting 1 May 361/2: Chaff-cutting was the order of the day among the toddlers.
1832		Egan Bk of Sports 199: The arrival of [...] lots of toddlers, all out of breath to arrive in time to see the mill.
1841		Era (London) 5 Dec. 11/3: Carriages, coaches, tandems, gigs, and horsemen, the ‘toddlers’ being as scarce as our present commercial demands.
1847		Bell’s Life in Sydney 20 Mar. 2/6: The todlers [sic] who were rather late had some difficulty in working their way to the arena.
1855		Fights for the Championship 117: The rain descended in torrents [...] soaking many of the ‘toddlers’ to the skin.
1926		N. Fleischer in Ring Nov. 10: toddlers--Pedestrians.

2. (also toddle) a foot; often in pl.

1821		Egan Life in London (1869) 278: Bill, at length, released the donkey’s toddler out of trouble.
1827		Exeter & Plymouth Gaz. 23 June 3/2: The man stood firm on his toddlers.
1835		G. Kent Modern Flash Dict. 33: Toddlers – legs.
1848		Flash Dict. in Sinks of London Laid Open [as cit. 1835].
c.1850		Duncombe New and Improved Flash Dict. n.p.: Toddles legs.