Definitions by Dr. Dirty

I'm gonna cum to your house and knock knock on the back door 

A dirty way of saying surprise butt-sex.

1.Waffles: Hey Dwarfo, I'm gonna cum to your house and knock knock on the back door. If you don't answer, I'm gonna bang bang!

Dwarfo: Yeep! I hope it isn't too surprise!

2. What rapists say to little kids when they are gonna butt-rape them.

I'm gonna cum to your house and knock knock on the back door by Dr. Dirty October 9, 2008