Top Definition
1. the four-pointed arrangement of a scrotum with three testicles and the penis on a human male
2. an anatomical analogue for bravery, boldness, or excessive masculinity
- Did you see Jane stand up to that asshole?
- Yeah. She's got a diamond sack on her.

- Did you know John has an extra testicle?
- No way. He has a diamond sack?!
by deanpence September 25, 2010

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