Cack sack is when two people are dancing and one of the people is saying “YIPPEE” and then someone in the party drops a pie and the pie land on the face of the YIPEE MAN you can say, he had a cacksack of a day
Man dancing: YIPEE
Waiter: WOOPS
pie: *in the air* *SPLAT*
man dancing : :( cacksack day to me