Origin: In philosophy "to Quine" used to deny existence of entities that cannot be individuated or identified (after ontological methodology of W.V.Quine).
Refers to the situation when intending to edit your post you misclick and quote it instead, resulting in two identical posts; thence the second post you replace with 'edit:quine'
Used at SA forums
variants 'QuINE', 'qine', 'quote is not edit'
(following post with the same content as the first)
(later edit of the second post) edit: quine