Neganap

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