The act of kissing with your asshole by placing your sphincter on someone or something and then flexing/clenching your but-hole causing a similar effect like if you were kissing with your lips. The variations are "wet" poop kiss leaves fecal matter on the targeted area. "Blowing" a poop kiss would be farting unfiltered (bare assed) within a inch of the intended target (extreme banzai crop dusting).
Travis was the first to pass out at the party so Dave decided to reward him with a poop kiss on the tip of his nose
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