disruptive chatter, idle chit chat/gossip,
casual social conversation
possibly an allusion to sound created by a jib sail 'flappin' as wind flows past
by McClintock February 15, 2007
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-ridiculous commentary, from an unwanted source, seebitch ass

excessive talking from women or womenly men
Stop flappin your ass back their!

If I hear any more ass flappin, a bitch is gonna get a slappin!
by Daniel Champoux October 20, 2007
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what came out of my mouth when trying to say "god damn lollipop" while trying to get a lollipop out of the wrapper while shroomin
"my copper flappin lollipop!"
by jenn November 15, 2004
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What you do when you are tweakin your head off
Man, you're flappin your F'n lid off!! Damn!
by paulgreco@cox.net January 30, 2004
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When you are having anal sex with a girl and you pull out and put it into her vagina.
Friend #1: I was have amazing anal sex with that filthy little filly Stacy and I pulled it out and put it deep in her bum, straight mud-flappin' bro.

Friend #2: Amazing, pure class.
by Timothy0Peden September 16, 2021
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In other words, juss sassin' ya. Comes from da playful-but-annoying practice of coming up behind someone who's wearing a long jacket with a divided lower back, grabbing da jacket just above da slit, and then vigorously/rapidly yanking da lower part of da jacket in and out to make da pair of tails slap against da person's butt.
Me: If yer too warm, why doncha go take a dip in da ocean?
You: Jump in da ocean??? Are you crazy??? It's chilly and whitecaps-windy out there!
Me: I know, I know... juss flappin' yer coat-tails...! :D
by QuacksO March 23, 2019
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