Green’s Dictionary of Slang

hock-dockies n.

also hockey-dockies
[hock n.1 + redup.]

shoes.

[UK]G. Parker Life’s Painter 173: Shoes. Hockey-dockies or box-irons.
[UK]G.W.M. Reynolds Mysteries of London vol. 2 142: Hock-dockeys Shoes.
[UK]Hotten Sl. Dict.
[UK]Sl. Dict.