Top Definition
That time of night when you should get off of the internet and turn off your cell phone because you lose all sense of right and wrong but you choose not to, and the next day you realize you gave away your darkest secret through facebook or sent it to your entire contact list in a text message.
Friend: whats up with your status telling everyone your Bi?

You: I'm sorry I was suffering from Midnight Insanity
by nickman859 June 05, 2010
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