A wastepaper basket. We don't need those reports anyway—you can put them in file 13.
See also: file
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. the wastebasket. (see also circular file.) I’m afraid that the papers you want went into file thirteen two days ago.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.