Top definition
When you wake up really early the next morning and your heart is pounding because you drank so much Red Bull the night before.

You don't feel sick like a regular hangover (that is, unless you were drinking jager bombs instead of straight Red Bull...)
"WTF? It's 6am and I'm wide awake, and my heart's pounding like I just did cocaine. Ahh, must be a Red Bull hangover."
by ihaveonerightnow October 04, 2007
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