Back spunk

When a man cums inside a woman's rectal passage and she then farts the spunk back out onto the man

My girlfriend had bad flatulence the other day...after I butt fucked her she back spunked me

by S3xxyTeets January 4, 2019

Squirt it back

When an individual gets a load of cum in their asshole. They then precede to squirt it back.

“She told me to cum inside her ass”
“Little did I know is that she would squirt it back”

by Queef machine January 14, 2019

Back Boner

When your spine gets stuff and hurts

Man I ran so hard today I got a Back boner
Well there’s no lube to ease that Back Boner

by Fudgedragon2005 January 15, 2019

Back crack

When a person is so fat that their butt crack extends up the middle of their back.

In my yoga class today, the new guy showed a serious case of back crack during several of the poses

by 3episodesofLITB July 24, 2018

Back Flush

Mostly used in the fag community, it is where two men touch their penises together so the pee holes line up and the fore skin is pulled together ( best with one uncircumcised penis and one circumcised ) Then they piss inside of each other's pee hole thus back flushing the penis.

Hey bro, you wanna back flush each other tonight after dinner.

by Back Flushing October 3, 2018

Back Booty

When the ass of a wo/man (or lack thereof) gives the appearance that their booty is apart of their back. There is no gluteal protrusion thus giving one a back booty.

Guy #1: Damnnnn her shit is wobblin’ bobblin’
Guy #2: nahhh I thinks it lows saggy asf. She has a back booty high key

Guy #1: you’re fucking dumb she got the C A K E S out

Guy #2: nigga if you look past the pants you’d see what I mean dummy her booty is too saggy.
Guy #1: this nigga dumb asf I swear *facepalm

by YeahhhhbabyweLiveee June 9, 2018

Back to the sender

When someone says “back to the sender,” he or she is sending a curse or bad wishes back to the sender. Usually used in christian or religious settings.

Person 1: The way you are, you will remain single forever.

Person 2: Don't curse me oh. In fact, Back to the sender.

Person 1: My village people won't leave me alone oh. Everyday is just one problem after the other
Pastor: Any negative curse placed on you, we send it back to the sender.
Person 1: Amen!

by pearl101 August 16, 2022