A fork of Rural Dictionary
The word penis spelt like this so elementary and middle school and sometimes in rare occasions can write the word on your hand or wrist by asking if you want to join the Pen club and are told by the asker they are Pen14 so you'll be Pen15 and they can laugh because they got you to let them write penis on your arm
Josh asked his school mate Alan if he wanted to join his new pen club, Josh then explained to Alan he would be the 15th member of the club. Alan agrees and doesn't realize until after Josh writes Pen15 on his arm in sharpie it's actually the word penis and Josh and a couple other class mates laugh because Alan is next to present his essay to the class and has on short sleeves