Any unusual sexual act between two consenting young people that only occurs because they both know that they're not supposed to be sleeping together. A common euphemism that went around schools in southern England in the late 1980s.
"Tracey and that there Sandra did the marmalade flapjack in the bathroom at Wayne's party and they had to replace the shower head after."
"I didn't even really need a babysitter anymore, and I proved it when me and Julie ended up doing the marmalade flapjack on the stairs ten minutes before my mum and dad got home. She still got paid and all!"
A woman with exceptionally large aerolla's.
Check out the nips on Flapjack Fannie!
When you fuck a Cambodian chick and she starts to accumulate so much sweat and stink that she accidentally sharts on your dick and then proceeds to give you head...
Yo... you know that girl Chi-Ling, yea I wasn’t expecting to giver her a Cambodian FlapJack last night but damn... it was fucking gross
Giving a blowjob to a Canadian man that smells faintly of maple syrup.
“I went to Vancouver over spring break and gave a Canadian flapjack during a concert.”
When two or more obese people get sexually aroused and have a hankering for cheese and have sex in a fountain of cheese, thus when walking by the fountain it appears to be cheesy flapjack.
The lovely obese couple looked like a "Cheesy Flapjack" inside the newly weds nacho cheese fountain.