the slate
The taint region of an animal, esp. pet dogs. Due to a dog's lack of buttocks, the region between the anus and genitals tends to lack any discernible features and instead exists only as a relatively plain and flat surface.
I awoke in my bed beside my dog, whose rear end was particularly close to my face. I was initially alarmed but was relieved to find that I was in closer proximity to the slate than the actual hole.
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