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."
by Kyle Willinger April 9, 2007
Get the the punching bag mug.n. The act of taking a used condom, tying it at the end (resembling a real punching bag), and pummelling one's parter in the face with it until it breaks and the semen inside explodes on her face.
by Bryce H. April 24, 2003
Get the the punching bag mug.When a couger gets down on all fours and lets you beat her titties with your weiner, not unlike a boxer would punch a bag.
by Otis Spunkmeyer__ June 22, 2011
Get the The Punching Bag mug.by Yeoldjokster May 6, 2016
Get the the old punching bag mug.(v) Masturbating. Whilst you masturbate, your hand may impact your testicles which share a similar shape to that of a speed bag.
by Tman227 September 11, 2016
Get the Punching the Speed Bag mug.