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 28, 2005

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.
Nipp: What do you mean?
Mavericker: You look like a FLAPPER GIRL.
by Wodderwick December 25, 2021

by 3Djoker November 15, 2018

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.
by fatmarrow June 20, 2010

by Dirty Bizzle February 20, 2009

•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.
•make sure she ain't no Fanny Flapper before you go for her, Son.
by Frank Fisterton February 21, 2018

by Brandaminator February 1, 2007
