This is the 12996th most frequent Spanish word.
pesadilla
Nightmare.
The word 'pesadilla' is used here to denote a bad dream experienced during sleep.
Ayer tuve una pesadilla que me despertó sudando.
Yesterday I had a nightmare that woke me up sweating.
Here, 'pesadilla' is used metaphorically to describe a difficult or frustrating situation.
Organizar esta fiesta sin ayuda está siendo una pesadilla.
Organizing this party without help is being a nightmare.
In this context, 'pesadilla' refers to a frightening or unpleasant scenario portrayed in the story of the movie.