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

phat back

A fat bum

Ngl you have a phat back

by DJkimble May 26, 2018

Back Freeze

Back freeze, or ice cream backache, is an intense pain in the back caused by eating or drinking something cold. It’s not serious and goes away in a few seconds or minutes. If you get one, try to bring the temperature in your mouth and throat back to normal.

Man that Sonic icee really gave me a back freeze.

by Flownetics October 9, 2023