Top Definition
A nap in which the desired effect is not only not obtained but has in fact been reversed.

A Negative nap, a nap that produces the opposite effect of a normal nap, leaving one tired and drained.
A: Why is John so tired? Didn't he take a nap before coming over?

B: He must have gotten a neganap instead.
by Visible Ninja April 21, 2010

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