A double entendre for a man with no equals. The no equals refers both to the fact that he is one of a kind and also to his exteremely small penis. The small penis reference is derived from the missing equals sign in the standard text representation of a penis 8==D.
Even though the artist formerly known as Prince may have rocked assless pants real hard, Matthew still remains the 8D.
8D by Jonathan Gunz May 13, 2005