From the merger of the words
crap and spectacular:
adj. - Of the nature of being particularly
bad or undesirable
n. - Something that is craptacular as a particularly
bad moment, event, or instance.
My
car broke down, I was late to work, and I got yelled at by my
boss. It was a craptacular morning.
The party was dull and had bad
music. It was craptacular.