Top Definition
Sort of like Amnesia.

It's when you have a late night conversation (usually while on the phone), while very sleepy. The next morning, you forget what you were talking about towards the end of the conversation.
Guy 1: Remember what we talked about last night?
Guy 2: Uhh... No, I think I have sleepnesia...
by RawrItsPanda November 11, 2009
5 Words related to Sleepnesia

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.