Sack Back

When one man places his sack on another man's back. Used in the penis showing game

Wacko:(standing shirtless working out)I love working out
Ed: (standing naked)I love my sack on people's backs
(jumps on Wacko's back, and his sack is on Wacko's back, thus giving him sack back)
Wacko: God damn it Ed!
Ed: Gotchya Wacko!
(Proceeds to kick Wacko in the ass twice)

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tuck your sack back

Grabbing your package and putting it in upwards of your butt cheeks.

Do Not tuck your sack back, we are Powerhouse!

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Sack the back

To penetrate an anus. Anal sex. Sack to have sex and back as in the behind.

Man that girl looks kinky, i bet she'd let me sack the backQ

Sack to back

A long lick starting at the sack and continuing through the ass which ends at the middle back

Hey Timmy if you aren't home by 9:00 your finna get a sack to back

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Back-sack

Back Sack is the backside of ones scrotum.

A: Yo dog, I can't believe you just ball-tapped me from behind, you got all back-sack.
B: Ew, check out that old guy's back-sack hanging out of his pants.
C: Check out Katz's shaved back-sack.
D: Mom, Jacob put his back-sack on my face.

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sack in the back

The act of a male tucking his penis and balls between his legs (in a Buffalo Bill type style) while turning around, bending over and exposing his ass with bulging sack to passersby.

As my roommate Jim returned from the shower, he tried to gross me out by performing his "sack in the back" routine in my presence.

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back sack

the back of your peaches

the back of your nut sack gets hit and your like ahh my back sack.

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