An old grade school prank. You'd write Pen 14 on your hand and walk up to an unsuspecting schoolmate and ask him if he wanted to join telling him he could be Pen 15. You'd then write Pen 15 on his hand, and everyone would laugh at him.
by Ritley August 24, 2003
 Get the Pen 15mug.
Get the Pen 15mug. by webstersheir62 February 28, 2003
 Get the Pen 15mug.
Get the Pen 15mug. by purplemonky November 11, 2003
 Get the Pen 15mug.
Get the Pen 15mug. by Ninoots! May 4, 2014
 Get the Pen 15mug.
Get the Pen 15mug. by Daddys cunt 💦💦💦 March 25, 2019
 Get the Pen 15mug.
Get the Pen 15mug. by IDIDATHING March 5, 2016
 Get the Pen 15mug.
Get the Pen 15mug.