Source : Webster's Revised Unabridged Dictionary (1913)

Cultch \Cultch\, n.
   1. Young or seed oysters together with the shells and other
      objects to which they are usually attached.

   2. Rubbish; d['e]bris; refuse.

Cultch \Cultch\ (k?lch;224), n. [Etymol. uncertain.]
   Empty oyster shells and other substances laid down on oyster
   grounds to furnish points for the attachment of the spawn of
   the oyster. [Also written {cutch}.]