Testicles. See also tallywacker, whack off.
His whacky sack looks a little swollen!
To have courage. To be tough. One who possess intestinal fortitude and resolve.
That cowboy has got some salt in his sack.
You got to have some salt in your sack to do that job!
a term to define a chick you like but aint trying to catch feelings for
boy 1: " you trying to hook up with her"
boy 2: " nah, thought about it but for now she my mack sack"
Two American dollars worth of regular cannabis.
Can I purchase a two sack, Bernard?
You most certainly may, Reginald, that will cost you two American dollars, though.