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That overwhelming emptiness you feel upon completion of any of the Half-Life games.
Man, I just finished Half-Life 2 and now I have nothing to do. I feel so empty. I think I'm going through a Half-Life crisis.
by Cypher Seven March 11, 2012
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The vengeful act of crapping on a lover's chest while they sleep.

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2
One has a half-life crisis the night before a large project or a big test is coming up the next day in ones Chemistry class.
Man, I'm stupid! Why did I ever take AP Chemistry? I've already exposed myself to 7 different types of radiation, and this project is due before I can go in for treatment! Pretty soon, I won't have a half-life crisis, I'll have a no-life crisis!
by Noah Anderson December 28, 2005
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