Back Crack 

When the asscrack starts at the lower back.

look over there is that his ass crack? No his pants are up it's his back crack

Back Crack by logan December 21, 2003

Back crack 

When a fat persons back is squeezsd together to resemble a butt crack.

1. Bill Clinton likes when he gets a glimps of pure unadulterated Back crack.

2. Most people hate it when a bead of back crack sweat slide into their butt crack.

Back crack by John Mousie February 17, 2009

Back crack 

When a person is so fat that their butt crack extends up the middle of their back.

In my yoga class today, the new guy showed a serious case of back crack during several of the poses

Back crack by 3episodesofLITB July 24, 2018

back crack 

backwards ass crack (front butt(vagina))

back crack, back crack it’s the crack that smiles back with things and knick nacks too.

back crack by thankiest thanker March 22, 2022

Back Crack Fart 

When a person (friend, family member, crush, boyfriend, etc) cracks a person's back by having a person lying on their stomach. They have the person laying on their stomach breathe in and on their breath out they push upward while applying force to the back. In this moment, while breathing out, this person lets out a fart.

Wow, I can't believe she back crack farted when he cracked her back.

Back Crack Fart by Funnymaker13 March 9, 2015

back crack and sack 

The removal of hair from the back, nutsack and between the ass cheeks to achieve a more groomed and streamlined look. Usually done by waxing at a salon, or by various do-it-yourself means in the home setting.

Jason has been begging his girl to toss his salad, but she says she won't get near it til he gets a Back, Crack and Sack.

back crack and sack by Gunga Din November 14, 2004

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!"

Sack Whack on the Back Crack by Zenovia's Playa June 14, 2009