Clump Addams is a deceased relative of The Addams Family. Uncle Fester explains that Clump was his "dear departed" brother. The last time he talked to him was at a seance, but Clump didn't answer. That's how Fester knew it was Clump, "He was a quiet one." He was the husband of Aphasia du Berry and the father of Cousin Creep and Cousin Blob.