What is "cultch"

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.]

2. Young or seed oysters together with the shells and other objects to which they are usually attached.

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

n. 1 Empty oyster shells and other substances laid down on oyster grounds to furnish points for the attachment of the spawn of the oyster. 2 Young or seed oysters together with the shells and other objects to which they are usually attached. 3 Rubbish; debris; refuse.