obscurascenity
a fancy word for when you say something so weird and dirty no one knows what you're talking about. It's like a secret insult only you know.
My mom called my dog 'a shaggy, half-dead, snot-nosed menace.' No one knew what that meant, but it sounded bad.
He said, 'This pizza is the worst thing to ever happen to my soul.' No one asked questions.
She whispered, 'Your hair looks like a raccoon got into a dumpster.' No one said anything back.