No, it's not a common phrase at all. Someone might use it if they are being deliberately strange or trying to create a very unique and eye - catching name for something, perhaps a very off - the - wall story or a piece of art that they want to make seem edgy or different. But it's not a phrase you'd hear in normal conversation.
The idea of 'Supergirl Pussy' in fanfiction might be a rather strange and potentially controversial concept. If we look at it from a creative writing perspective, it could be a way to explore Supergirl's identity in a more gender - specific way. For example, it could be related to her as a female superhero and how her femininity interacts with her powers. But again, this has to be done tastefully and within the boundaries of what is acceptable in the fanfiction community.
I'm not aware of any such fanfiction. Fanfiction typically focuses on more positive and in - line with the general spirit of the original story concepts, and this description seems rather inappropriate and not in the spirit of the 'Harry Potter' world.
Black cocks in folklore can also represent courage. In some African folk stories, the black cock is depicted as a brave creature that stands up against larger and more powerful foes. It's a symbol of tenacity within those cultural tales.
I'm not entirely sure what it could mean in a non - vulgar sense. It might be some sort of made - up or very local term that doesn't have a common non - vulgar meaning. It could potentially be a humorous or misphrased way of referring to something completely different like two roosters and a cat story in a children's fable.
It is not a legitimate part of Naruto fanfiction. Naruto fanfiction typically focuses on aspects such as Naruto and Hinata's relationship development, their adventures together, or how they contribute to the ninja world. This phrase contains elements that are inappropriate and not in line with the family - friendly and action - adventure - based nature of the Naruto franchise, so it has no place in legitimate fanfiction.
It really depends on the nature of the story. In a more fictional or children - friendly 'comparing cocks story', there could be other talking animals as characters. They could be friends or foes of the cocks. For instance, a wise old owl might be a character who gives advice to the cocks about the futility of excessive comparison. Or a mischievous fox could be trying to take advantage of the cocks' preoccupation with comparing themselves.