The Collaborative International Dictionary of English v.0.48:
Sparerib \Spare"rib`\, n. [Spare, a. + rib.] A piece of pork, consisting or ribs with little flesh on them. [1913 Webster]WordNet (r) 3.0 (2006):
sparerib n 1: a cut of pork ribs with much of the meat trimmed off