One of the best "real" words in the English language.
A term to describe something monsterous or hideous.
What is that monstrosity on your head!? Is it a dead bird? O.O
"It's my favorite hat." *awkward silence*
HE'S JUST A POOR BOY, FROM A POOR FAMILY, SPARE HIM HIS LIFE FROM THIS MONSTROSITY!!!
Bob: What is he building?
Me: A monstrosity. :)