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1.
Pronounced: octo-puss-hwä'

A term popularized by an episode of Comedy Central's "Drawn Together" where Princess Clara reveals her monsterous eight tentacled genetalia due to a curse inflicted by an evil step-mother.

Also used to reference a particularly unsightly or disfigured vagina that induces uncontrolled vomiting.
Example:

Girl: Scott and I were getting hot and heavy last night but he was turned off by my octopusseios.
by Figaro The Cat March 11, 2006