Quack 

in very complicated chipmunk terminology this sound is often referred to as "sex" or even "fuck" in the mating season (12 Months a year).

"Damn woman you look fineee! we should Quack!"

"Why yes, a quick Quack is what i need right now."

Quack by chipmonk182 September 5, 2011

quack 

An online or e-slut who will often prey and stalk pre-pubescent teen boys via the internet.

Quack and nightfall cyber while playing WoW.

quack by Tom Bolton November 4, 2006

quack 

A pseudomedical "professional" who earnestly believes in their products or procedures (as opposed to a fraud, who knows he is full of shit and just wants to make money), which in actuality are of dubious merit and are possibly injurious.

(Name) the quack (my chiropractor)
Was a squat little ape
With a mouse's voice
And a pigeon's gait

quack by Anon343 March 16, 2008

Quack 

alternative term for the act of passing wind, but done so with tremendous gusto!

Franny has let out a horrific quack.

Quack by Wayne August 20, 2003

quack 

To claim possession of something for when you return, such as a seat. Short hand for the phrase "quack quack I get my seat back"

Counter arguments include:
1. Move your feet, lose your seat
2. Cluck, cluck, I don't give a fuck!

Abby gets up from the couch and says, "Quack!"
Abby has 'quacked' her seat, thus no one else can take it.

quack by Savannah Cheyenne February 18, 2008

Quack 

A sound made by french people when trying to say yes.

"are you gay?"
"Quack."

Quack by gay frenchie November 23, 2009

Quack 

A squeaky little kid (ages 4-14) that rage on games such as COD

I'll fuck your mum
1 vs 1 me bro
Bring it I'll fuckin rek u
Is that your mum in the background? Calm down Quack

Quack by Pakifromthecornershop February 27, 2015