Common term for labia majora, often used to express your sincere affection for a female acquaintance. For a stronger expression of appreciation it is common to add the prefix "piss-"
"hey girl, nice to see you, I'm just gonna get a drink and I'll be back to slam those flaps."

"hey Trixi, I told the rest of the team about your loose flaps and they wanted to check you out"
"hey boys, wassup"
"so, you cool if we all take a turn pounding those piss flaps"
"Hahaha, you can do anyfing you like"
"sweet, that's a good little skank"
by skumliterati March 11, 2015
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A goalkeeping faux pas whereby the player between the sticks comes haring out in order to catch the air bourne ball and misses it leaving him red faced and shamed.
If he flaps at that ball one more time then I'll kick his wife in the flaps
by tom December 19, 2003
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referring to someone who is flappy. particularly someone who is overly obese to the point where their body flaps.
i was at burger king yesterday and i saw flaps ordering like a 10 stacker with a diet coke.
by mazimaz July 11, 2008
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during sexual intercourse, the sound two bodies make while knocking boots
that girl was flap flap all over the place.

did you hear about her raw flap flap wetness last night?

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A flap-flap is an alternate name for winged animals mostly pertaining to fowl and bats. Other mammals that have folds of skin that can act like wings such as sugar gliders and flying squirrels. Insects and other mammals that use their extra skin to maneuver can be their own genus of flap-flaps including stingrays, dragonflies, butterflies and honey bees with the exception of wasps who are just assholes.
Flap-flap... Makes me smile just saying it
by Itsybitsymissy January 12, 2016
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shaking one's willy in an eccentric and exciting manner. often resulting in hilarious and wet consequences. can be used as a form of foreplay or to attract other people to engage in the mating process, much like a peacock displays her feathers to attract a mate. a male human will often display his willy in an appealing way to gain sexual prowess.
i am going to use my extreme flapping capabilities to attract a mate at the club tonight.
by sfccurtyla November 11, 2013
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A person who chickened out and ran away from a challenge and / or a fight.
Person 1: Aw mate, how was Jake and John's fight yesterday?
Person 2: It was complete and utter shit! John absolutely flapped it!
by HoldenAlucard March 21, 2016
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