Sack to Back or Sac to Back

Sack to back is the term used when two males ride a motorcycle or scooter together.
Also referred to as "Butts to Nuts"

Those guys are riding "Sack to Back or Sac to Back"

by Indetrucks February 17, 2011

Sack Whack on the Back Crack

The act of thrusting the man junk so far into a woman's (or man's if you are homosexual) anus multiple times that the balls consistently slap against the "host's" butt cheeks making a sound like a great high five.

KirtKanReed: "i am soo hungover bro, i can't remember anything about last night."

ChadKant: "you wouldn't want to."

Zenovia's Playa: " YEAH! BECAUSE CHAD GAVE YOU THE sack whack on the back crack WHILE YOU WERE SHIT FACED DRUNK LAST NIGHT AND PASSED OUT ON THE COUCH!"

by Zenovia's Playa June 14, 2009

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)

by I Cruuuuuuuuuuuuuuuuuuunch you May 24, 2009

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!

by Bitty Bitt December 29, 2016

Sack Back

When someone gives you a piggy back ride and your balls are on their back...raw.

I was drunk in the shower and fell. He gave me a piggy ride to the ER then I gave my friend sack back on the way there.

by Sugar Flaps August 20, 2021