What does the phrase "Deep Six" mean?

The phrase "Deep Six" is commonly used to mean to dispose of or throw away something, often in a casual or somewhat dismissive manner. The origin of the expression is believed to derive from nautical terminology, where "six fathoms" (approximately 36 feet) was considered a deep enough depth for disposal, especially of items that were no longer wanted or needed. It conveys the idea of sending something to a place where it will not be recovered, much like the action of throwing something overboard into deep water.

This meaning aligns closely with the context in which the phrase is frequently employed, often implying that the item in question is no longer of value or relevance. Recognizing this meaning is essential for understanding colloquial expressions related to disposal or abandonment in both nautical and everyday vernacular.