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.
by Ray Boston January 19, 2007
mugGet the sack in the backmug.

Sack in the Back

When a person places their scrotum between the ass cheeks of another.
Bro 1: Hey bro, can put the sack in the back
Bro 2: I would love your scrote between my cheeks!
by LlihTter November 06, 2017
mugGet the Sack in the Backmug.
When the folds (Wrinkles) in a scrotum resembles that of a smiling face. Eyes and Mouth are required, nose is preferred, but not required. THE SACK MUST BE HAPPY!!! Must be declared by a spectator, not the one whom the sack belongs to!

If the "FACE" is hairy, 'Ball Bunyan That Smiles Back' may be decalred!
Donny: Dude, George, I think I got The Sack That Smiles Back, but I'm not sure... Help me out

George: O, definitely dude!! I can feel the happy vibes going on around your nutsack. That even may be a 'Ball Bunyan That Smiles Back!'

Donny: GET THE CAMERA MAN!!
by Door2Door_DoorSalesman February 18, 2011
mugGet the The Sack That Smiles Backmug.

Sack from the back

When your man ain't acting right...so you grab his nuts and squeeze from the back.
by Jazmuffin July 07, 2016
mugGet the Sack from the backmug.

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
by ToeKnee September 17, 2005
mugGet the Sack the backmug.

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
by Sacktacious May 27, 2018
mugGet the Sack to backmug.