Gregory's ServerEFNet stands for Eris Free Network. Eris is / was eris.berkeley.edu who got booted from the network for controversial behavior.
EFNet was very cliquish and was known as a good old boy’s network.
The one thing the developers got right was Glines (Global blocking).
I hope you enjoyed this short history lesson.
@HopelessDemigod Good to know, thanks for the correction!