When a clitoris grows to an abnormally large size, large enough to be used for penetration. Mostly seen in whacked out Japanese hentai.
After initially protesting and crying, the purple haired schoolgirl eventually started screaming out for more as she was reamed by the evil ninja witch headmistress's gigantic clitpenis. While uhh, a tentacle monster fucked her from the front.
A clitoris, enlarged to the point where it comes into question whether or not it is actually a small penis.
"Man, I was about to fuck this hooker last night, but when I reached downstairs I felt something weird. Couldn't tell if it was her clit or a cock, so I kicked her clitenis-having ass out of the car!"