To give your scrotum healthy swipes of a stick of deodorant between your nuts and thighs.
I knew I was too late for a sack swipe when I dropped my shorts to urinate and could smell my own nuts.
The art of swiping someone’s sack.
Commonly used in Dora the explorer
“Greeting everyone I shall now swipe all of your sacks”-the sack swiper
“Hey stop your Sack Swiping”-Dora
“Darn”-the sack swiper