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When you watch a movie and it ends without any specific conclusion, so the viewer feels betrayed; as if they had been shitting and there's still some left so their butthole still feels dirty.
1. "I just watched the end of the Matrix Reloaded and it was such a dirty ending."

2. "I just took a dump and I feel like I've had a dirty ending, so I should probably get back to dumping soon."
by girlwithchoco December 14, 2011