A single particle emitted by the fup, often detected by a fup-o-meter. If enough fupons are present, they are often visible to the naked eye, and may cause a tingling on the back of the observer's neck, similar to the feeling of goose bumps.
by Aeroh4x December 15, 2008

by Aeroh4x April 03, 2007

by Aeroh4x December 15, 2008

by Aeroh4x December 15, 2008
