What is the definition of Thickness Macabre?

"Thickness macabre" is like describing a cake that's so dense, it's as if the frosting's been turned into a gruesome, over-the-top horror novel. Imagine a cake so thick you'd think it's made of actual skulls and bones, with frosting that's so gooey you'd need a spoon for every bite.

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Here's an edgy, unsettling example sentence: "The macabre thickness of the cake's frosting made my stomach churn like a zombie's gut."