Top Definition
An extremely long or never ending series of unfortunate or terrible events or experiences.
Dating her wasn´t just a nightmare - it turned out to be a nightmarathon.
by Evil Dirt
August 06, 2008
1 more definition
2
A series of bad dreams in a single night.
"I slept terribly, as I suffered from a night-marathon."
by rickbbiking
April 21, 2013
