To de-pledge yourself from a fraternity/sorority by your own free will, or because of fear, A self "Kack"

-Named after an ex-pledge with the last name Quack
-He went and quacked himself

-So I heard he was quacked
by P-diddy April 4, 2004
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Stupid ones who believe that they are in an honorable position, though their entire reality is, in fact, based on a pile of crap
Psychiatry is a profession for quacks--no one can truly understand the human mind.
by JoeJoe321 February 2, 2009
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a term used for indulging sexual orgasms and noises.
Lauren loves to "quack" when having sex with...a kid who loves to throw pissballs at her.
by Andrecito February 18, 2003
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For a bitch to go on talking endlessly.
My mother is always quacking her jaw at me.
by GuidoPosse69 February 21, 2005
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A term for reserving a seat.
Me: Quack Quack Seat Back.
You: Well, you can't reserve seats here.
Me: Well, shit in my purse!
by Timmy Sanders March 6, 2006
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Expression used when referring to someone that is a duck. Simulates the sound that the animal known as a duck makes. Appropiate when out in public and you see a duck but don't want to risk someone noticing the fact that you are insulting them. Orgin is the show Growing up Gotti, where there is the biggest example of a duck, a gentleman whose actual name is quack quack.
"You cried during the movie??? Quack Quack, I knew you were a bitch."
by Gregory G. October 16, 2005
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