the low you hit after a great party

The feeling you have after a big party you had been anticipating is over.

Feeling letdown, gloomy, or sometimes even lonely the day (or days) following a party or other enjoyable social event.

is commonly experienced following parties of any kind. Severity of symptoms may depend on a number of variables, two of which being the duration of the event, and general level of epicness. The symptoms of depression may include, but are not limited to: feelings of emptiness, loneliness, disconnect, gloominess, and general sadness. The individual may feel reclusive, or oppositely, the need to connect with certain people -- possibly both. Once everyone has gone their separate ways, the world feels empty, and one may feel disconnected from it. Their emotions feel detuned and/or out of tune, creating an inescapable feeling of dissonance. For the time being, one is without their much needed sense of normality which, while emotionally disconcerting, may cause him or her to become very reflective in a rather nostalgic way.

Basically hungover but with remorse and pain that results from over doing it the night before.