- Archaic burial at sea
- a discarding or disposing of something
Origin of deep-sixprobably origin, originally in reference, refer to the customary minimum depth, as measured by a lead line, for burial at sea
- Burial at sea.
- Disposal or rejection of something: gave all our plans the deep six.
Origin of deep sixAmerican slang, a grave, referring to the conventional depth of a grave (six feet).
transitive verbdeep-sixed, deep-six·ing, deep-six·es Slang
- To toss overboard.
- To toss out; get rid of: deep-sixed the incriminating papers.
(third-person singular simple present deep-sixes, present participle deep-sixing, simple past and past participle deep-sixed)