A phrase as catchy as 'Feature Creep' but for underestimated projects
computer-science, project-management
Solution
I believe the term you are looking for is Death March, though I suppose it doesn't really apply if the project is ultimately successful.
Problem
I'm needing a term or established term to represent a phenomenon our company currently calls a 'Black Hole': a project that takes magnitudes longer than estimated, yet we're already sucked in and HAVE to see it through to completion. EDIT: Hoping that the best term will be voted up.