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often abbreviated to just "CI", cunt island is a place where cunts go or can be found, often in mass groups. if one were to be looking for a group of people who could be labeled as "cunts" or wanted to classify someone with the traits of a cunt, they could put them in this group.
"That guy cut me off! Oh, he must live on Cunt Island"

"I hear there's a luau tonight on Cunt Island, i bet that stupid guy is going"
by readytoluau25 June 13, 2008
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