Flabjacking 

When two (2) or more obese individuals engage in coitus.

Angus and Gertrude were flabjacking all night so I couldn't get any sleep.

Flabjacking by skitz1o1 March 11, 2011

flatpacking 

The Process of Putting Flat pack furniture (think IKEA) back into its original Box

The process of Un-Flatpacking is removing flat pack furniture from the box and forming it into the product.

Hey Man, I'm moving house, want to help me with some flatpacking? I have an Ikea desk and the original Box

flatpacking by IkeaSwede September 2, 2012

flapjackin'

The act of folding the excess body cleavage of an obese man or woman, typically used for making sweet love to an alternative orafice. Crisco, rendered bacon fat and luke warm butter are all optional.

Leroy: Dude, I went hoggin' on some white bread last night.
Darryl: Did you get the stank?
Leroy: (ashamed look)
Darryl: Don't tell me you went flapjackin' again mothafucka!
Leroy: It wasn't my fault, dat bitch passed out cold so I found a flap and I jacked it!
Darryl: Hell yeah! Jack dat flap negro!

flapjackin' by DarrylandLeroy January 30, 2009

Flapjacking 

A male with an erection, lies on his back while a second erect male inserts the penis of the first into his anus then lies back. A third male inserts the penis of the second into his anus and lies back forming a stack. A three man stack is known as a short stack, A stack of four or more is known as a full stack. Full stacking has the added benefit of asphyxiating the bottom participants. The flapjacking experience can be enhanced by using maple syrup as lube and having each participant massage the balls of the person above.

Mark, Mike, Jason and Joel were planning a full stack flapjacking session last night but Joel didn't show, so the three had to make do with a short stack.

Flapjacking by crankbait July 27, 2012

Flatbacking 

A bitch or bird with no job who sleeps around for money and material things.

Yo! How did Shawty get that Gucci Bag, she don't work even no where?

Ans: Shawty be flatbacking.

Flatbacking by V Double November 10, 2010

Flapjacking 

Motorboating a girls ass.

That girls ass was so round and fat that I was flapjacking that shit all night long!!

Flapjacking by jjstl April 27, 2010

flapjacking 

to roll down the windows of your car and let your boobs hang out and flap in the wind.

emma was flapjacking last night.

flapjacking by ashannah March 3, 2010