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14.
an ambiguous verb that can be used in reference to literally anything. Some examples are dying, falling, making a mistake, missing a scoring opportunity in football, etc.
Dude, totally quacked.

He's quacked.
by ykdrummer91 April 17, 2010
2 2
 
1.
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
487 105
 
2.
The sound a duck makes
"Quack"
by Lindsay February 25, 2003
408 126
 
3.

1. a fraudulent physician

2. any physician
This quack has no skills in medicine at all.
by Light Joker December 31, 2005
180 111
 
4.
A very sexy sound when moaned by a girl.
guy: so what do ducks say?
girl: ...quack.....
by MallardDuck January 31, 2009
143 106
 
5.
noun: slang for "crazy" common in the south, especially near areas of high duck concentration.

1. That's quack, man.

2. You're so quack.

3. Dude! that's quack, yo!
by thats whack February 22, 2009
87 63
 
6.
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
93 70
 
7.
-To quack is to perform an act that displays one's stupidity, incoherence, lack of coordination, or outright inability to relate or adapt in a social setting. Derived from the sound a duck makes, more specifically the verb form for what a duck (see definitions 5,8, and 9 for "duck") does.
-To fuck up the situation for everybody.
You missed the biggest quack!
What happened?
____ ran down the hill, tripped and busted ass all over the sidewalk and fence by the tennis courts!

How was your birthday?
Fun as shit, we got fucked up then ______ quacked ridiculously by hitting the blunt BACKWARDS! He didn't even notice for like 2 seconds, then he got up and slid down the hill and lost his keys.
What a fuckin' quack

I dropped the entire pizza on the ground.
You're so quackin.
by DaQuackyPaki December 06, 2009
36 24