National Activity Day 

National Activity Day, or NAD, is an awesomeness-based organization for outdoor activities in San Francisco's Fort Mason park (previously Moscone Park). Participants, known as NADders, exude genetic magnificence and are often mistaken for ninjas by onlookers. During their weekly meetings during the months of March to November, they can be seen engaging in such activities as: ultimate frisbee, soccer, supporting local Round Table Pizza establishments, and sitting in circles indian-style to discuss awesomeness and how good at it they are. New participants are welcomed openly, provided that they possess a satisfactory level of absurdity and tolerance for sarcasm.

Also see: lilNADs

"Dude I saw some wicked-awesome people throwing the disc in the park the other day. Any idea who they were?"
"OMG that was NAD! You know, National Activity Day, where lameness goes to die? You must have been totally blinded and humbled by their radiation of sheer awesome!!!"
"Yes, I actually fell to my knees and wept. First in sadness knowing I could never be like them, and then in thankful joy that such heroes exist."

National Activity Day by evee746 February 4, 2010