Percy is the street name for a very bad case of HPV virus, otherwise known as genital warts. Percy looks like skin tags, or raised moles, but are on the genital area, or the anus. Some descriptions are that they look like small califlower clusters, except they are not white. If you want to see a picture of them, go to Yahoo images, and put in the keyword genital warts.
Nick caught percy from his slutty girlfriend. Then he boinked her again trying to give them back to her, and she gave him a double dose.