Top definition
One who will not attend informal social events and/or events that do not bare historic or cultural importance.
Percy is an eventist - he said he CAN now come to our party since i've told him that it's for our engagement

Or

Rowena declined to join our family trip to Milnthorpe until I told her it was an annual thing, she's an eventist.
by WalterJ July 11, 2013
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