Top Definition
to sleep copiously; often during the winter time, or while incredibly ill. May be following the ingestion of excess amounts of food. Usually involving a bed, though it isn't required. Not to be confused with Hibenerdate.
"What did you do over winter break Mark?"

"I was exhausted from exams, so I ate thirty tacos then hibedernated."

"I was wondering why you missed a month of school."
by Doxic June 03, 2013
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