quack 

1. One who is of methamphetamine addiction.
2. Someone who is really fuckin weird

1. Don't get near that fool, he's a quack.
2. He bought doughnuts for his cat, what a fuckin quack.

quack by Iron-man_matthew April 10, 2008

quack 

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

quack by P-diddy April 3, 2004

Quack 

A Kawasaki motorbike.

"Can I 'ave a ride on ya Quack mate?"

Quack by Halo August 30, 2003

quack 

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.

quack by JoeJoe321 February 1, 2009

Quack 

A name used to insult a person; also used as a substitution for fag

Guy 1: Hey dude, i drank all of your Starbucks latte.

Guy 2: Come on! You're such a freakin quack.

Quack by Landino069 December 1, 2010

quack 

to love

Ehsen and Cynthia quack each other.

quack by Ehsen March 10, 2009

quack 

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.

quack by Andrecito February 17, 2003