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Someone who overly participates in an event or conversation. Sometimes referred to as an "askhole", you will commonly find Overparticipators in company meetings asking obvious questions and talking for the sake of just talking while trying to seem as if they are actually participating. You will also find overparticipators in large protests that are there simply to say they are there without knowing the actual cause.
"Ugh the new girl was such an overparticipator in that meeting, it took FOREVER!"

"At this point is seems like Occupy Wall Street protestors are being total overparticipators."
by SeattleN00B November 04, 2011
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