The echelon of intelligence where one has an IQ of less than 100. The morons who believe they are an expert in every subject and believe their opinion is more valid and/or unanimously shared among their peers. They believe that constantly calling something what they believe it is means that it objectively must be that thing. Jealousy, ignorance, or idiocy can be the root cause of this elite club.
"What is it with baseball that triggers the Below 100 Club?"
"Twitter just won an award for being the number one site that contains members of the Below 100 Club."