1. When someones balls show up on an X-ray.
2. When the guys testicles are so hard and cold, it could be those of Bill Clinton.
AAAAARGH! Hillary whacked those marble balls!
When a man is cold, and his testicles shrink so badly that they feel as small as marbles.
Guy 1: Dude, it's so cold. It has to be about 5 degrees.
Guy 2: Hah, you probably got marble balls right now.