Definition of "deep six" in English

Verb

1. To discard, get rid of, or cancel; to completely put an end to something.

   • They had put many hundreds of hours into the project before it was deep-sixed by management.

2. To submerge (something) in water.

Noun

1. An ejection, discardment or destruction.

2. The grave or death; also, the (notional) place where something is discarded.