Backla 

Backla: A Sancho’s nick name for a 100% fruitcake.

Your girl got a text from sancho.

And it’s the same number as “ backla” your dude on the side 100% fruitcake.

Backla by Bigbirddebelen May 22, 2022

Eugene Backpack 

Noun:
A carrying book bag of any sort or size, preferably something large enough to carry a fire arm in.

"Eugene was reaching into his backpack when in the classroom and all was silent..."

"The police investigated a eugene backpack, only to find zipties, a fedora, and a loaded nine milimeter handgun."

Eugene Backpack by innocentEugenewithbackpack May 27, 2016

Backlit

Ejaculating an unfathomable amount of cum on a human males back, typically after engaging in homoerotic activities with a male (or trans male).
The word is stemmed from the phrase "light up my back."

"Dude, how was Thailand? Did you get any of their cheap sex massages?"
"Naw dude, I paid them extra to backlit me! It was awesome!"

Backlit by Svensk och Indisk Pojke September 26, 2019

Backblast Area Clear 

a. a military cautionary statement, when one is firing the AT-4. One looks behind them, scanning for personnel 100 meters back in a 90 degree cone, once it is clear they yell backblast area clear and fire.

b. One looks behind them, and whether it's clear or not, yells BACKBLAST AREA CLEAR, and rips a loud veracious fart.

a. READY, BACKBLAST AREA CLEAR, FIRE FIRE FIRE

b. Hey Tom, backblast area clear, RIPPPPPP HAHAHAHA

Backblast Area Clear by Military guy April 10, 2009

Koopa-Backdash-Wave-Slide-Hover-Walk-Moon-Landing 

In Super Smash Bros. Melee, characters who's walk-acceleration is lower than their traction value after wavelanding backwards can buffer a slight walk forwards to decrease the momentum lost. The walk input must be at its lowest value to perfectly execute the tech. (rough translation of inputs) Characters with low traction (Luigi) benefit worse than those with higher traction values in Melee. (i.e Gannondorf can benefit from the Koopa Backdash Wave Slide Hover Walk Moon Landing more than Luigi in terms of distance)
Youtube has more info on this.

The Koopa-Backdash-Wave-Slide-Hover-Walk-Moon-Landing can make virtually anyone feel like they are playing on ice.

Koopa-Backdash-Wave-Slide-Hover-Walk-Moon-Landing by Do_mmar September 11, 2020

korean backdash 

An advanced defensive meneuver created by the Chaiwanese. This technique requires a person to dip their head and shoulders while stepping backwards to avoid being physically hurt. Often done multiple times in succession.

Aris flew into a hotdog fueled rage after his attacks were thwarted by a masterful dance of korean backdashes.

korean backdash by vicnuggets May 30, 2018

Backcase 

There are three different meanings for the word 'backcase'

- First it could mean a spine in a suitcase, this is the literal meaning
- The intent of 'backing up' a friend in a fight of some sort
or
- When your mate thinks they're hard so they cause a fight and then realise they're only talent is running so they ask their friend to have their 'backcase'

Friend 1 - Oh yeah mate, I'm gonna have a fight with _____
Friend 2 - Alright man I got your backcase
Friend 1 - Thanks mate!

Backcase by LazyLollipopGumdrops July 13, 2017