The state of being achieved by remaining awake for extended periods of time. Common symptoms are euphoria, minor delusional behavior, and general silliness.
Distinguishable from sleep deprivation by the lack of paranoia that often accompanies the latter condition.
"We were up til stupid o'clock last night."
(Immediately after someone attempts to stage dive off the sofa onto the coffee table while watching a Madonna video): "Yeah, it's definitely stupid o'clock."