tight sack 

An expression of coolness.

john says "Hey Kevin i just bought an RX-7."
Kevin says "Dude tight sack."

tight sack by John Tenn February 16, 2009

tight sack syndrome 

the tightening of a man's ball sack in cold weather or times of worry.

jake has an acute condition of continual tight sack syndrome

tight sack syndrome by tie-t sac sin-drome December 5, 2003

tight ball sack 

When cool air hits your junk. The automatic body reaction is to try to keep your balls warm. Keep your swimmers from dieing. So the scrotum skin around them contracts.

This reaction happens on other occations to.

For example
Your ex. Girlfriends voice can send your balls running!

balls scrotum cold ex tight ball sack tight sack

tight ball sack by Solo_device86 February 15, 2017