backas 

When a male wants to have sexual intercourse with a women doggy-style. Usually if the women has a large or fat butt.

That girls ass is sexy! I want to put her in the backas!

backas by daroscade November 25, 2009

Backseating 

In a stream, telling the streamer what to do instead of letting them take their own decisions

I'm not going to do a genocide run, stop backseating me

Backseating by Bonaaq February 19, 2021

backseat boogie

Sex in a car seat.

Ben Dover was doing the backseat boogie with lovers all summer.

backseat boogie by I, Wreckerrr November 16, 2016

Backseat Gamer 

Like a backseat driver, a backseat gamer is a person who tells you what to do in a game that you're playing while you're playing it.

"No, shoot that guy! Not that one, that one! The other guy!"
"WILL YOU STOP BEING A BACKSEAT GAMER PLEASE?"

Backseat Gamer by NINJA_CARROT July 11, 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

Backseat DUI 

A backseat DUI occurres when a sober person is driving an intoxicated person home, and the intoxicated individual is giving the driver shitty directions, and false instructions to turn, and then saying "No, No, not this street..."
This causes the driver to speed up, slow down, and begin to turn, then swerve back into the driving lane, leading others observing the vehicle from the outside to believe that the driver is DUI.

"I was driving Marcus home the other night from the local water hole and he kept telling me to turn and shit and I was all over the place and then I got pulled over, but it was cool, the cop realized Marcus was just backseat DUI."

Backseat DUI by Mike McLovin March 16, 2008

Backseat Fruity Loop 

Backseat fruity looping is a sexual act wherein one partner applies a colored, sweetened substance to their lips and then proceeds to 'loop' the other partner's rectum with the substance, by pressing their lips against their backside.

"Lex backseat fruity looped Jordan's asshole the other night. He shat green for a week."

Backseat Fruity Loop by Darkbat420XXX September 25, 2011