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A doctor of questionable ablitiy and reputation.
Even tho Erin's dad claims to be a doctor, I say he's a quack! He didn't even graduate high school!
by Stella Lafayette December 04, 2004
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4
A scam-artist. A person who makes up bullshit medical products or advice or prescriptions that don't work. A snake oil salesman.
Most alternative medicine "specialists" and psychics are quacks.
by Anonymous February 17, 2003
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Quack is a word that can mean many things. It is the sound a duck makes, it can be an insult, & it can be a punch line.
Duck: quack
Angry human: what a quack!
Funny human: your just quacking me up!
by NoodleQuack February 19, 2018
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1. The act of pulling down a beanie-hat hybrid over someones face to where the bill of it is over their mouth, hence the quack.
Bro: dude that nerd is way to nerdy to wear that cool hat.
Bro2: I know dude. Let's quack him.
...
Nerd: Ahh noo. I've been quacked!
by SEV3N November 07, 2011
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