Eton slang. [Of obscure origin.] Eatables of various kinds, especially dainties.
1825. C. Westmacott, Engl. Spy, I. 39. Then, after holidays, Tom gives sock so graciously, that he is the very life of dame s party.
1866. Routledges Every Boys Ann., 310. Sellers of sock, that is, eatables,sweet mixtures generally.
1881. in Pascoe, Every-day Life, etc. 25. The consumption of sock too in school was considerable.
attrib. 1866. Routledges Every Boys Ann., 194. Theres my old sock-shop.