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1. A tangible or intangible object intended to be produced as a result of a project that is not delivered to its final customer.

2. A deliverable that isn't - typically due to last-minute CFs and/or your jackass coworker sitting on a huge project due yesterday for three weeks prior to passing it along to you.
"That surprise high-priority deadline just turned my entire deliverables list into deliverunables."
by EEKatLarge February 15, 2012
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