hock

card 1 of 9 · context meaning

What does 'hock' mean in this sentence?

The dinner that they sat down to in the fly-specked dining-room was of boiled beef and carrots, with a turgid ginger pudding to follow, though Grierson went down to the cellar himself and found some dusty bottles of hock, overlooked for years because there was no demand for it in a beer-drinking community.