On February 31, people pack in the sack all day
I packed in the sack with my boyfriend, last pack in the sack day.
Every February 31, Kurtis's family and friends pack in the sack all day.
Paul and Andy are going to tag team Kurtis's mom on Pack-in-the-sack-day.
The Snack Pack Sack Attack is quite simply, the result of a young man dipping his testicular sack (ball sack) into a snack pack (pudding), preferably tapioca (for the joy of texture), and then dipping that sack into a young womens mouth (teabag)
ball sack + snack pack + teabag = YES
"Hey remember that time when little Billy passed out in the locker room and Coach Sourbee snack pack sack attacked his ass??"
"yeah, I heard they pressed charges or something"
When you pack multiple sacks (scrotums) into any such sack. The sacks could include, but are not limited to: underwear, mouths, back packs, etc.
After the guys went streaking, they could only find one pair of underwear. They either had to go commando or pack and sack.