Top definition
In a pornographic film, or in real life, when the male's scrotum is long and loose, and is riding a female hard, the balls will slap against the female's body, created an additional slapping noise, hence, the bonus ball slap.
Listen to that bonus ball slap.
by sir poopiepants March 20, 2006
Get the mug
Get a bonus ball slap mug for your mother-in-law Nathalie.