Someone who thinks they can rap but they can not. So they just flap their lips trying to rap about absolutely nothing.
by 0808NAX February 27, 2018

by LJS Meat Sweats August 3, 2015

The highly velocitized escape of gaseous matter via the rectum whereby the rim of the sphincter is first inadvertently puckered inward, then violently blown outward causing a momentary flapping as the blast escapes then subsides. The turbulent build up generally occurs as the sphincter is squeezed shut for extended periods. First dates, group meditations, and solemn religious ceremonies frequent such occurrences.
by Paco February 27, 2004

The release of loud flatulence that sounds noticibly moist and wet. The hallmark of the Moist Flapper is that the flatula released always sounds wet but may not always actually be wet and result in the release of any feces aka Moose Jelly requiring a quick wipe.
Sherwin was rearranging his couch when he pushed on the heavy price and wound up straining and dropping a Moist Flapper. Fortunately it only sounded wet and didn't require a wipe.
by Eaton Holgoode November 5, 2014

by Gary F February 4, 2009

When the external labia are so large and pendulous, that they flow freely in the breeze, loudly slapping against the inner thighs and each other.
Dude, check out Allie May's pussy flappers flailing around town from under her skirt. What a slam pig!!!
by Troup 100 December 13, 2005

The act of flapping porn cards on the Las Vegas Strip. The flapping sound is the cards hitting the below minimum wage workers hand a split second before he/she extends the hand for you to take or not take said card.
by GoDeep&StopLuxor January 27, 2009
