n. [tired] old bullshit. (Based on déjà vu, and the moo brings in the bovine aspect. Contrived, but admirable nonetheless.) Are you still peddling that nonsense. Nothing but déjà moo, all over again.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.