the punching bag
When you punch yourself in the balls as hard as you can to kill the sperm right before you ejaculate into a woman's vagina as to avoid other forms of birth control.
"Wow, the punching bag I gave myself last night hurt, but not as bad as 18 years of child support would have."
the punching bag by Kyle Willinger April 9, 2007
Get the the punching bag mug.