ball sack Share definition Flag hairy, hangy; unusual, disfigured sack that hangs precariously from a male penis. usually accumulate sweat and the smell of human feces. i licked a ball sack. then i barfed. ball sack by Chrysti March 1, 2004 Words you can keep railfan mug chonk mug chud mug based mug 67 mug slime mug mogging mug chopped mug thot mug glazing mug huzz mug yams mug larp mug unc mug cracked mug simp mug baddie mug bop mug lolcow mug