Back to back

The act of two people deficating in the same toilet seat thus they are using there backs as support.

After a long committed commited friendship, bob and I decided to perform back to,back. back to back

by Rickie Mitch March 11, 2014

Back to Back

Where two males back up on a large dildo

Did you here Brent is the BYC back to back champion!

by Bye week March 23, 2021

On the back

What teenage Christian girls say when a boy is about to cum while having sex.

Jack: I'm about to cum!
Abby: ON THE BACK!!!!!!!!

by 1a2b12c June 29, 2014

back on

The act of train surfing on the rear of the train often from station to station. This act is commonly practiced by urbexers, eshays and gimps looking for an adrenaline kick.

Hey bro, did you see the video of Josh doing a back on the other day! What a mad cunt!

by KneeTheBarrier October 14, 2019

back

An especially fine woman's butt.

So ladies (yeah), ladies (yeah)
If you wanna role in my Mercedes (yeah)
Then turn around
Stick it out
Even white boys got to shout
Baby got back

All credit humbly given to Sir-Mix-a-Lot

by baby got it goin' on February 13, 2004

Backing

To Back A Friend Up If Some Yutes Starting Beef

Yo Jack You Backing Sam Tommorow

by JohnWayneGacy52 May 20, 2019

in the back

Where every store owner keeps your size.

Excuse me. Do you have a size 7 of this in the back?

by Evenfiber1068 December 14, 2014