whack the bag

To jerk off profusively pounding on your sack.

I caught Gil whacking his bag today.

by phil January 24, 2004

whack bag

the art of walking past one of your boys and giving him the little "love tap" back hand to his privates for sport.

Corey didn't expect the whack bag I layed on him in the line at Subway.

by Rus from providence RI January 27, 2004

Whack Bag

A hard strike to ones genitals, Usually done with closed fist, or foot.

" All I did was poke her sisters tit and she freakin Whack Bagged me in the giggle berries!"

by Jimi November 23, 2004