I believe the word has different meanings in different Hispanic cuisines, but I'm looking for the stuff that Puerto Ricans use to flavor some of their dishes. I've seen it described as BOTH salt pork and fatback, but as far as I know those are two DIFFERENT things. Which one should I ask for and where should I look? I asked at Faicco's, a pork store in the West Village; they didn't have fatback.
Also, what's a good substitute?