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Consuming vast quantities of stimulants (namely caffeine) followed by vast quantities of alcohol. The caffeine keeps you on your feet, the alcohol takes your inhibitions and blacks you out.

The result of this combination is a blacked out person who won't pass out.

Running blackouts usually result in stupider, more energetic behavior than a regular blackout.
Dude1: Oh bro, I had a wild night last night?
Dude2: What happened?
Dude1: I drank two bottles of 5 Hour Energy and a fifth of Jack. I don't remember anything but my friends told me I played pool and darts all night.
Dude2: Oh man, that's a RUNNING blackout!
by Herr Leiber January 26, 2012
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