Today's Word of the Day means...
To dispose of, discard, or get rid of: “The board of directors deep-sixed the proposal without even reading it.” This phrase is derived from the noun “deep six,” meaning burial at sea and referring to the depth of water necessary for such a burial. The term was later used as slang for a grave (customarily six feet underground) and, by extension, as a verb meaning “to kill.”
A grave (1920s+ Underworld)verb phrase
To discard; jettison; throw overboard: One White House disposal crew even unblushingly planned to deep six a file in the Potomac/ If any publication is deep-sixed, it will almost certainly be ''The Car Book'' (1940s+ Nautical)Related Terms
[probably fr the combined notions of a grave as six feet deep and a fathom as six feet in depth]