1) The lower leg, but in the plural it was used for fur taken from the legs of animals, especially black lambs, used for trimming outer garments.
1463 j togam pennulatam cum buggishanks, Leeds
1497 my cremesyn gowne furred with blake shankes, York
1531 for iij blak-lamskynnes viijd, and for a pursell of shankes & v caulinge of shankes ijs vjd, York
1544 one gowne purled with shankes, Pontefract.