What is Dead Horse's Ass?
1.
saying that means what you are asking for is absolutely not going to happen.
When somebody asks for something that you're not going to give them or do for them, your response is "Sorry, but I'd say you're looking up a dead horse's ass"
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1.
When a female gender poops or sharts while wearing a thong. After this a male gender takes the soiled garment and holds it horizontally..