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.

whack bag 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!"

Whack Bag by Jimi November 23, 2004

whack the bag 

To jerk off profusively pounding on your sack.

I caught Gil whacking his bag today.

whack the bag by phil January 24, 2004

whackbag 

1) An idiot, a stupid person.

2) A scrotum sack that has seen too much masturbation.

1) STFU, whackbag.

2) Dude, lay off the pr0n. Your whackbag is about to fall off.

whackbag by King Asshat XVIII of Asshatia July 20, 2005