To expell gas from one's anus with such force that both sides of his/her buttox slap together to create a distinctly audible, and occasionally painful, vibration.
During the awkward silence on his date, John let forth such an intense cheek flapper that the silverware on the table rattled.
by Shpoiken April 29, 2005
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Flappers of the 1920s were young women known for their energetic freedom, embracing a lifestyle viewed by many at the time as outrageous, immoral or downright dangerous.
Mavericker: NIPP you look like you belong in the 1920s.
Nipp: What do you mean?
Mavericker: You look like a FLAPPER GIRL.
by Wodderwick December 26, 2022
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When a guy sits on a girls vagina and farts causing her pussy lips to smack around.
Him: “Spread your legs babe”
Her: “what for?....”
Him: “for the ol flapper smacker
by 3Djoker November 16, 2018
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Little England flags that are attached to car windows when the England football team is making a brief guest appearance in the first couple of rounds of a major football tournament.
I didn't expect Barry to stick chav flappers on his BMW
by fatmarrow June 18, 2010
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A woman's flap of her vagina that looks like a piece of shaved beef
Wow, heidi had a real crazy looking pair of beef flappers.
by Dirty Bizzle October 15, 2008
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Another word for a woman who sleeps around.

(Flap thier Fanny)
•She's just another Fanny Flapper, you deserve better than that.

•make sure she ain't no Fanny Flapper before you go for her, Son.
by Frank Fisterton February 20, 2018
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The act of jumping up and down and making your ball sack slap against yourself.
"I remeber in like 6th grade Wilcox did a flapper jack!"
by Brandaminator January 30, 2007
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