"meat of a hog's hind leg used for food," 1630s, from Old English hamm "hollow or bend of the knee," from Proto-Germanic *hamma- (cf. Old Norse höm, Middle Low German, Middle Dutch hamme, Old High German hamma), from PIE *konemo- "shin bone" (cf. Greek kneme "calf of the leg," Old Irish cnaim "bone"). Ham-fisted (1928) was originally in reference to pilots who were heavy on the controls, as was ham-handed (by 1918). With hammen ifalden "with folded hams" was a Middle English way of saying "kneeling."