Smooth back 

A flat booty bitch

like that song go , "How the fuck you thick with no ass , you gotta Smooth back"

Smooth back by @keepinupwit.ky November 30, 2020

Smooth back 

Someone with a flat ass

“You flat you got a smooth back”

Smooth back by K00chiman November 30, 2020

smooth back 

no ass, all back

how tf you think with no ass you gotta smooth back

smooth back by Mel Hamm November 29, 2020

backdoor cooch smooch 

Spreading your and your partners buttcheeks and rubbing your buttholes together in a scissoring movement.

My girlfriend and I took it to the next level and backdoor cooch smooched last night.

backdoor cooch smooch by Smoothstarfish March 24, 2017

jerb 

well known from south park
rednecks get angrry that future folk took there jobs so they yell
They took ouare jerbs!

Them future folk took ouare jerbs!

jerb by Jimberley Kim April 7, 2005

Cheeks 

An Irish phrase meaning shit, derived from ass
(Not to be confused with the literal description of one's buttocks)

"Did you hear the song Aylek$ dropped?"
"Hardly. Her music is absolute cheeks."

"My boyfriend say LaFlame is cheeks."
"Tell your boyfriend I said it's his mixtape that's cheeks."

Cheeks by thecartisan April 26, 2020

sans sheriff 

Lawless use of fonts or typography, with no regard to aesthetics or legibility

I'm putting this CV straight in the bin. Written totally sans sheriff.

sans sheriff by Jamarley July 3, 2019