When an assignment or project is under the "Vampire Rule" it means it is due before the professor gets up in the morning...

Commonly around sunrise.
When working on a Systems Architecture project at Drexel U. the professor sends out an email around 11pm stating the deadline is no longer midnight, but is now under the "Vampire Rule". This creates confusion and disarray for the student who planed to still go out at midnight and have a good time; Now they are forced to complete the assignment in order to stay with the curve.
by Disgruntled CS senior February 12, 2008
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