The rear hole of a female. Usually it tends to be more wide than regular butt holes. Robin is short for "Robbing", usually being used as "Robbing that bunghole of what it contains."
"Damn, I cant stop thinking about how big robins bunghole is."
"ikr dude, I could fit my head in it."
"ikr dude, I could fit my head in it."
by Robinsbunghole November 12, 2017
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