1) A fictional weapon rumored to exist in half-life 2 that consists of a dead rat attached to metal handle used for swinging at the desired opposition.
It swung the rat flail at the medieval Goblin.
by Bettermann February 28, 2005
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Bag-flailing is when a person empties the contents of their backpack, satchel or purse onto floor of friend/relatives home trying to find something in the scattered cluster fuck of said bag.
Do you mind if i bag-flail on your floor so i can find my car keys, I don't want to do it on the sidewalk and look like a junky.
by Zambler a.k.a Renniks Foog September 10, 2013
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When one fist is shoved wrist deep in the Vagina, and the other is likewise inserted into the anus. One then proceeds to lift the recipient into the air with both fists, the recipient thus becomes the human flail.
Bro1: Bro, my girlfriend and I tried The Human Flail last night!

Bro2: Dude, no way! How was it?

Bro1: It was great! Arms, legs, and titties were everywhere!
by Batgirlkyoki February 21, 2016
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waving your arms around in an entertaining fashion to confuse your fans and make them think you can still dance.
1: Did you attend The Circus Starring Britney Spears?
2: Hell no, I'm not paying $100 to watch her pass off her arm flail crap as dancing for an hour and a half.
by Craig Dylan February 27, 2011
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Victoria, BC
A person who degrades a situation. If someone is late they are flailing. Your chillin with your buds and one of them is a mooch and a complainer, they're a flail. Everyone shows up and the booze is already gone, that's a flail situation.
Kim hid my weed, sorry guys, she flailed us out.

Ben's coming? What a flail!
by WhiteyB Dragon December 13, 2009
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When You Encounter A Magikarp In Pokemon And All It Can Use Is Flail.

An Even Bigger Epic Flail

When Said Magikarp Beats You Using Flail.
1) "Magicarp Used Flail! Nothing Happened." Haha Epic Flail
2) "Magicarp Used Flail! IT WAS SUPER EFFECTIVE" OMGWTFHAX!
by xStarwolfx April 11, 2011
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A type of dance done by hippies that involves lots of jumping and waving their arms.
Haha look at those guys do the hippy flail.
by Dundreth July 24, 2010
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