Top Definition
The act of staying awake for an unusually long stretch of time. It generally becomes a life marathon after you've been awake for a full 24 hours.
Sorry if I'm a little spacey, I'm in hour 30 of a life marathon right now.

I have work, 2 papers due, and a wedding to go to. I'm going to have to pull a life marathon.
by sangreazul December 21, 2010
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