the pen15 club 

A club that can only be joined by writing "I love Pen15" on your forearm.

Person 1: Hey! Are you in the club?
Person 2: What club?
Person 1: The pen15 club!
Person 2: Cool! How do I join?
Person 1: Just write "I love Pen15" in your arm!
Person 2: *Writes* Oh shit.

the pen15 club by The Snick-Snack March 2, 2014

pen15 

Exclusive club for those in 6th and 7th grade. Only requirement to enter is to have the club's name written on one's body part, such as an arm or hand.

Johnny, join the Pen 15 club! Alls ya need to do is let me write Pen 15 on your arm.

pen15 by MoonKnight November 25, 2002

pen15 

A mock spelling of the word penis. Can be used to trick ones friend.Mostly Done by children in the 5th or 6th grade.

Hey Mat you wanna join the Pen15 club? Just let me write Pen15 onyour hand

pen15 by Lincoln Barltett February 9, 2003

PEN15 

Something that people at the age of 12 or under write on one's body part. It is the ritual in which to get into the PEN15 club, if u write it the correct way, the 1 looks like an I and the 5 looks like an S, so instead of looking like pen with 15 latched onto the end, it spells out PENIS.

Lynn: Wanna join a club?
Caroline: Sure! what club?
Lynn: The PEN15 club! here, this is what it is!

(Lynn writes on Caroline's arm 'PEN15'.)
Caroline: What's PEN15?... OH FUCK!! YOU JUST WROTE PENIS ON MY ARM!!

Lynn: Haha, Sara showed me!

Caroline: you mean Sara from 6th grade? you talked to someone in the grade ahead of us?
Lynn: yeah, she wrote it on my arm first...

PEN15 by Valerie Mann December 30, 2010

Pen15 Gang 

Fun Middle school game ware you write pen15 on there hand and laugh.

dude: want to join the Pen15 Gang

Other kid: sure
dude writes pen15 on the other kids hand
Other kid: omfg lmao :} you wrote penis on my hand

Pen15 Gang by you thought porter April 17, 2019

pen15 

A word that, when handwritten, resembles penis. Write on someone's hand and good times will follow.

If you want to joing the pen15 club, you have to let me write it on your hand.

pen15 by Anonymous November 23, 2002

Pen15 Club

A club in most middle schools around the country. Consisting of mostly prepubescent boys.

Each member receives a "club card" with their name and "Pen15 Club Member" on the card.

When the new member receives the club card then realizes that he/she has just joined the penis club.

Joe: Billy do you want to join the Pen Fifteen Club?
Billy: YES! I will conform to you all because I want to be cool and popular!
Joe (while snickering): Here is your membership card!
Billy: You wrote Pen15 Club! that is the same as the Penis Club! HAHA, OMFG, LMAFO, LOLZ!

Pen15 Club by Red Sim February 23, 2010