Backbox 

The second calamari ring on a female that is often brown not pink

Uncle Rego stuck her thumb in her backbox

Backbox by blairemichelle! June 12, 2018

smash her backbox in 

To indulge in anal sex, or indicate the desire to indulge in anal sex. To take some from behind sexually, anally.

She's fit, i'd like to smash her backbox in. Look at the ass on that, wouldn't you like to smash her backbox in.

smash her backbox in by Hypnosid October 22, 2007

Jellyfish Backbone 

Jellyfish backbone is a person who says one thing but does the opposite and blames others.

My boss has a Jellyfish backbone.
She speaks of standards and holding employees accountable for results. But, every time she has the chance to prove her statement she makes excuses and does nothing.

Jellyfish Backbone by Mr. Harrahs March 5, 2014

backbone of bts 

Kim Namjoon aka RM is the backbone of group BTS. BTS started with him and wouldn't even exist without him. He is their backbone.

Kim Namjoon is reason why BTS exists, he is the backbone of BTS.

backbone of bts by rmsng May 14, 2021

barkbox 

A lighthearted and childlike term for an endlessly yapping, pneumatic little canine.

Our little barkbox is just one of a multitude of informal and vociferous four-legged emissaries to the rest of the neighborhood who may not comprehend or appreciate the cultural importance of them being here and making their voices heard!

barkbox by Dr Bunnygirl July 22, 2020

Hit the Backboard

When jerking off on the toilet, you turn around to blow your load into the bowl but miss and hit the seat cover

Person 1: Dude, what the fuck is all over my toilet seat?
Person 2: Sorry bro i hit the backboard.

Hit the Backboard by jews69 March 20, 2016

Backbone 

Individuals who make a substantial contribution to a team/event/organisation. Without them the whole thing would fall apart.

Jay Robinson is the Backbone of 4Marketing
Perry Padina is the Backbone of FCC Paragon

Backbone by The R Rated Superstar December 19, 2013