When your sexual partner gently steps on your ball sack, he begins to step harder and harder giving you an awsome sensation. You will be lined up in a t-formation, with eyes closed. You can also try this with your face.
Bare footed, foot sacking is the best way to be foot sacked.
The fat that rolls over when you wear too tight of jeans, which shapes the form of looking like a fleshy sack, often refered to as "muffin top".
"Jennifer Lopez's butt sack pops out everytime she puts on a pair of jeans, causing rolling blackouts in Southern California"
Ball Sack
The female version of a douchebag, i.e. guys wearing polo shirts, popped collar, etc. A ball sack is a female that wears inappropriately tight clothing, typically has bleach blonde, damaged hair, acts stupid because they think it's cute, has a fake tan and nails, and has a very high opinion of themselves. They generally assume everyone wants to be like them and guys want them but truthfully, everyone looks at them because they are so pathetic. Other identifiers: hoop earrings, designer sunglasses, obsessed with labels, too much eyeliner, nail art, pink lip gloss, sense of entitlement, lack of ambition, likes meatheads, is a lush, and often quite slutty.
That girl standing at the bar wearing a Bebe shirt with orange skin and dry, straw-like hair, ordering a glass of White Zinfandel is a real ball sack.
when you and your roomate are each having sex with different women, in a different room, where each roommate tries to make the most noise.
dude, i deffinitly won battle sacks last night
When a man is wearing tight pants and the crotch seperates his testicles showing a bulge on each side of the seam.
Look at that guy, his pants are so tight I can see his sack Knuckle.
when a males scrotum makes a light clapping sound on the females vagina or butt.
i came home from work and asked my girlfriend if we could play a game of patty sack.