1 definition by Thunder C.
(verb) The act of chugging your drink on command. When someone yells ball sack at you, you must comply by immediately finishing the rest of your drink.
Kathleen ball sacked Jess when she noticed Jess was nursing her drink.
Jess was ready for another round so she ball sacked her friends that had not yet finished their drinks.
Jess was ready for another round so she ball sacked her friends that had not yet finished their drinks.
by Thunder C. July 9, 2010