Evannap
A nap that unintentionally goes on for several extra hours.
Dude1: im going for a nap, Dude2: aight cya in an hour so. Dude3: hes been gone like 6 hrs. Dude1: yeh so im back now... i kinda slept for a few extra hours :S Dude2: man! thats an Evannap