Top definition
A Whale Sack is the slang term for a whale genetal. Usually, sperm whales are called this.
Boy : look at that sperm whale
Girl : sperm whale? Thats a Whale Sack!
Boy : whats a Whale Sack?
Girl : you.
by whalesack May 26, 2014
Get the mug
Get a Whale Sack mug for your brother-in-law Callisto.