To hide or dispose of something in such a way that it will be
extremely difficult or
impossible to find or recover, even for the person doing the hiding. Get rid of. Nautical in origin, it comes from a call
indicating a depth of six fathoms (over ten meters), a depth from which recovery of an item tossed overboard would be very difficult.
Argggh, matey! Deep six the
crack pipe before Admiral
Billy-Bob catches us.
Jimmy-Joe, we'd better deep six the whole meth kitchen before Andy Taylor shows up at the
trailer park