When your in school and you get a piece of cake that has lunch lady pubes on it.The word originated when a certain student had a huge pube on his cake at school one day.
Wait ryan don't eat that! It's a pube cake!
by bill simpson December 14, 2005
I have a 4:30 class in Pube Cake, but I think I might skip it.
by Hull Kogan March 18, 2004