Wiktionary
ham shank
n. (context Cockney rhyming slang vulgar English) A wank. Masturbation.
Usage examples of "ham shank".
Denise remembered something as they were ready to go and they put the leftovers in the refrigerator for the maid: ketchup and mustard, pickles, oleo, bread, a ham shank and the two inches of Almaden red that were still in the bottle.