Weekends in which friends get together and participate in activities seen as 'nerdy' or 'geekish' when in fact are insanely fun. Normally held in secret to avoid social exclusion from other members of society, or to prevent overcrowding at such events. Participants will not speak of these events outside their own friend group, and can be the source of many inside jokes. Many examples of these are shown in media, although are not recognised often as 'geekends'. For example, in Jim Carrey's Yes Man Norm holds a Harry Potter party in which everyone must come dressed as their favourite character from the books, and participants hold a Potterthon.
Person 1: Holding a geekend tonight at my house, how about it?
Person 2: Do you need me to bring my Star Wars box set?
Person 1: Already provided my friend.
The transformation from a dude to a geek is called getting geekonised. The ultimate product is a Geek-on a organism that belongs to the Geek-dom. Geekonisation happpens mostly due to pressure from the guards of the Geek-dom a.k.a teachers. Once inside the Geek-dom there is no way out. Geekonisation is not reversible......
A complex, long and detailed explanation of a subject that usually only the speaker has any interest at all in the information. Everyone else lost interest at some point (usually at the beginning) of the conversation.
I experienced a brain aneurysm about 5 secs into Ted's geeksplanation about why Star Wars stormtroopers always missed their target.