back fart 

One of several potentially awkward sounds created by the body's interaction with air, this one the result of suction from when the lumbar curve of the back is pressed flat against a smooth surface and then lifted, making a loud fart-like sound. Back farts most often occur when having sex on linoleum or when shifting about in a tanning bed.

J: T and I were doing the grown-up in stealth mode on that big mahogany table in the conference room last night, and I pulled this massive back fart.

A: I hate when that happens. Were you embarrassed?

J: Yeah, but only because the janitor heard it and opened the door.

A: Zut! what did you do?

J: I told him to drop trou -- daisy chain!

back fart by JohnnyAZ May 21, 2006

Back Fart 

The sound of a back fart is made in the following way: Two naked people lie back to back and press the arch of their backs together, pushing the air out and creating suction between the backs. They then move apart, causing a release of the suction, which creates a loud, often disgusting, fart sound.

In lighthearted moments after making love, Mo and Sally enjoyed a session of back farting before dozing off together.
Mo: Oh, Sally! That was great!
Sally: Yeah, Mo. But you know, it’s not complete without a session of back farting! It's my favorite!
Mo: Okay, get into position!

Back Fart by JungliBilli April 25, 2016

piggy back fart 

When in a group of people, a silent fart is made by one of the group. Invariably, the smell produces the "Who did that?" quote. When the offending person admits to it, one or more people will let silent but deadlies go, knowing the original offender will be blamed. Thus, the piggy back fart.

John farted and a couple of us piggy backed on that shit.

piggy back fart by Joe April 10, 2005

Back Crack Fart 

When a person (friend, family member, crush, boyfriend, etc) cracks a person's back by having a person lying on their stomach. They have the person laying on their stomach breathe in and on their breath out they push upward while applying force to the back. In this moment, while breathing out, this person lets out a fart.

Wow, I can't believe she back crack farted when he cracked her back.

Back Crack Fart by Funnymaker13 March 9, 2015

Back to Work Fart 

A fart that is dispensed at work in the middle of a group of people discussing non-work related events.

As Kurt, Justin and I laughed about the previous weekend's activities, an unrelenting stench crept from somewhere beneath the bowels of hell, forcing us to scatter and get back to work. Our manager smiled knowing that his Back to Work Fart was a success.

Back to Work Fart by LaGoat April 17, 2011

backfart

When you lay on your back on tile and move your back up and down, making a farting noise

Hey let me backfart in your kitchen.

backfart by Noggle123 May 30, 2018

Backfarted 

When a male human farts, and the produced gas comes up through the front, bubbling underneath the subjects testicles. The horrid smell gasses the farter, making them severely nauseous, to the point of barfing on oneself.

Oh man! I needed to fart so bad, felt it coming up and decided to let it rip, suddenly I realized, it backfarted! I almost killed myself!

Backfarted by letrollie October 24, 2017