The action of slapping your genitalia (not just for men) until the one who's genitalia is being slapped reaches orgasm.
John: Hey Frank, my Girlfriend and I just tried slapperbating eachother last night.
Frank: Really, I tried that and it hurt. A Lot.
Frank: Really, I tried that and it hurt. A Lot.
by That_Slaperbating_Guy November 19, 2015
A technique for masterbation commonly found in middle schools, where the penis is slapped with the force of god, so hard it bruises and gets calloused, for pleasure.
by Isaacthegoat April 13, 2022