What is Marble Bag?
1.
Speedo bathing suit.
Kevin, at the pool: Hey what's that clacking noise?
Mark, puffing out his chest: That's my marble bag. Check it out.
Kevin, cupping: Not bad, not bad.
Mark, jumping back: Hey! Look, but no touch!
Kevin: I've held better.
See
2.
The male genitalia. More specifically the scrotum.
Dude! You hit me right in the marble bag.
3.
a pair underwear the only supports you balls
man that guys wang isnt in his underwear
See
