Noun.
  1. Apparently, obsolete american slang for pork and beans.

    Used by William S. Burroughs in The Place of Dead Roads: Salt Chunk Mary is a fence who serves pork and beans to everybody who drops by.

  2. A kind of fishing lure (US?). I had a hard time finding much on this.

  3. A salt lick.
None of these usages seems to be terribly common.