Quack 

when duck go quack it is saying you are a dumbfuck

"quack"

Quack by eaitsinagay January 2, 2021

quack 

A code word for quarter, as in a quarter ounce of smoke/weed.

"How much does a quack run?"

"Can you do a quack?"

quack by Laura Hill August 17, 2007

quack 

A term used by the supporters of conventional medicine to insult anyone that supports alternative medicine.

Alternative Medicine Supporter: I started oil pulling and using herbal tooth powder. The result is that my teeth are very white and my mouth never felt this good!
Conventional Medicine Supporter: What you're doing was made up by a quack artist! The results that you are seeing are a placebo and the medicine you're using doesn't work.
Alternative Medicine Supporter: How can you tell me that the results I'm seeing are fake? They are clearly real. Let the results speak for themselves! Watch me demonstrate.

(The Alternative Medicine Supporter reveals his teeth and that are so bright white that they stun the Conventional Medicine Supporter!)

quack by Phantasmagorical Necromancer June 25, 2015

quack 

It's when you do an animal. Used a lot by Karthiks

I'm so quacked! That was some doge ;)

quack by cuckthick January 14, 2018

Quack 

When a girl choaks on your dick and she sounds like a duck

I remembered how she quacked last night suckin my dick.

Quack by SoloCommando September 2, 2019

Quack 

(v) To reserve for future use, esp. a seat. "Give me my seat - I quacked it 5 minutes ago!"

(n) An agreement that a person has Quacked. "Jason's quack is still in effect for another three minutes."

Quack by tenfour October 25, 2003

quack 

a doctor

quack by eH? March 17, 2003