Ball Sack
"Dude, stop being such a ball sack."

"John Kerry is a ball sack. Barack Obama should have rejected his endorsement, because it makes him look like a ball sack, too."

"The reason a man doesn't like a strong woman is because he is a ball sack."

ball sack a wuss, a wimp, a crybaby, a coward, proof that there is no intelligent design

I mean, it makes a lot more sense than calling someone a "pussy" (the vagina is quite resilient).

And it's fun to say.

Just sayin'.