Top Definition
When you take a short nap in the hopes that doing so will revitalize your mind, body and soul, effectively refreshing you completely.

Except in this case, it completely backfires on you and has terrible reverse effects; you wake up feeling even more tired than you were before, you're groggy, cranky and quite possibly feeling ill.
Sue: Are you getting ready to go out and watch the ballet with me dear?

John: Hell with that crap. I fell asleep and it totally napfired on me. Now I feel like a bag of smashed ass. Take your mother.
by scaryjesus January 23, 2012

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