cultch, 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. [1913 Webster]
Young or seed oysters together with the shells and other objects to which they are usually attached. [Webster 1913 Suppl.]
Rubbish; débris; refuse. [Webster 1913 Suppl.]