The Dictionary of English Nautical Language Database: Search Results
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Term:
deep six (n)
Definition:
1) Deep water. Water deeper than the leadline can measure. More than six fathoms; as in “When the man measuring soundings calls out “By the deep: six!” you know there is plenty of water under the keel.” 2) To throw overboard. To discard; as in: “Just because the clock stopped working you did not have to give it the deep six.”
