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flap jacking 

when lying naked on ones bed and jumping on to your stomach then to your back resembling flipping a flapjack
I was flap jacking so hard my bed broke!
flap jacking by MC triple T January 3, 2011

Flap Jacking 

Jacking off onto pancakes and then eating it
"What did you have for breakfast, Jimmy?"

"I did a little flap jacking"

"deeeeeelicious"
Flap Jacking by Dirty dirty girl January 3, 2007

Flap Jacking 

A tandem masturbatory technique in which the participants lock arms at the elbows whilst gripping the shaft of their penises. They then flap elbows like a bird in synchronization to most efficiently share the work of jacking.
I jerked off with my friend, but it wasn't gay because we were flap jacking.
Flap Jacking by Kingsbury Brothers February 6, 2010

flap jacking 

where you masturbate and then ejaculate into your palm and then consume it. the move must replicate the motion of pill popping in Requiem For A Dream.
Despite common misconception flap jacking does not indicate homosexuality.
flap jacking by Nick Jaynes April 22, 2007

Flap-jacking

Flatulence while sitting on the floor of a shower.
After a combination of Indian food and a long night, Susan often finds herself the next dat flap-jacking during her morning shower.

Flap’jacking 

Someone that talks smack, over dramatizes and instigates
They are always flap’jacking everything
Flap’jacking by dizybits May 30, 2018
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kidulting by Emotional Cruiser October 12, 2025
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British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026
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