a gradeschool prank usually you would write:
Pen
15
on your hand, then ask if they wanted to join the pen15 club. it worked best if you had a bunch of people do it. then you would get them to go through the secret ceramony where you would write "pen15" in the so that it looked like you wrote "Penis" and you would point and laugh. best done with sharpie marker.
Pen
15
on your hand, then ask if they wanted to join the pen15 club. it worked best if you had a bunch of people do it. then you would get them to go through the secret ceramony where you would write "pen15" in the so that it looked like you wrote "Penis" and you would point and laugh. best done with sharpie marker.
dude: Hey I joined the pen 15 club!
chick: Pen 15 club my ass you have penis on your hand, get the fuck away from me!
chick: Pen 15 club my ass you have penis on your hand, get the fuck away from me!
by maxzilla April 25, 2005
Get the pen 15 clubmug. prostitute. started in the civil war When Gen.Hooker of the Union Army (the first pimp) tried to protect his troops from VD by buying the best chicks and pimping them to his corps of 20,000 men. orginally hooker's girls.
by Maxzilla June 20, 2003
Get the hookermug. placenta. some children are born with it. in some cutures (Cuba for example) it is considered extremely lucky, and the person may carry it in a pouch with them wherever they go to bring luck.
by maxzilla January 07, 2004
Get the caulmug. 
a good interjection for when someone is talking about something you don't want to hear about, or when you can't think of something to say. sounds almost like a duck when said.
#1: so then I saw funny colored puss coming out of my dick and...
#2: mak mak mak mak! on to more not-STD related crap.
#2: mak mak mak mak! on to more not-STD related crap.
by maxzilla June 22, 2003
Get the makmug. 