That awful you feeling you have when you know you will be going out/to a party/social event later on in the day. Characterised by awful boredom and a feeling that time is going far more slowly than usual.
Person 1: Fancy going out into town tonight?
Person 2: Ok
*3 hours later*
Person 1: *Looks at clock again* Damn still got another 2 hours before I go out, damn this PREPARTY BOREDOM!!!!!!