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An idiomatic phrase expressing that if something looks and acts a certain recognizable way, it probably is exactly what it appears to be.
"After the liquor store was robbed, a man was found leaving the scene carrying a gun. Did he commit the crime?"
"If it walks like a duck, looks like a duck, and quacks like a duck, it's a duck."
by AH73 October 17, 2013
mugGet the If it walks like a duck, looks like a duck, and quacks like a duck, it's a duck.mug.

Quack

- a sound that the duck does.

- slang word for a strong bond two people made in a short amount of time.
Levi and I have a strong quack. I quack him a lot.
by souuu July 30, 2017
mugGet the Quackmug.

Quack

A more simpler and more generalization of the term is when someone starts explaining the formula of e equals mc squared, when nobody even asked for it and/or cares. Basically someone who never shuts up about anything medical, technological, biological, historical, logical, how great a movie is, how great a game is, why someone is so cool, alright alright, you get the point.
Major Zero: She was originally named Quack.
Naked Snake: Because she never shuts up.
Major Zero: Yes, that's exactly it.
Paramedic: No it's not. Snake tell him.
Naked Snake: ...Gotta go.
by bumerhoomorr34 May 9, 2021
mugGet the Quackmug.

mackin' quack

A Mac computer user that think he/she is the dominant keyboard clicker due to their bit apple computer and their turtleneck and funky glasses. They tend to pay double for what things should cost.
Look at that fool, he's one of those mackin' quacks.
by Roachbug August 21, 2010
mugGet the mackin' quackmug.

cheeses quack

Hey bro, ya mans on some cheeses quack?

Yessirrrr
by WEEDEATER💚739 June 9, 2019
mugGet the cheeses quackmug.

quack

he’s such a quack

quack
by quackag May 9, 2021
mugGet the quackmug.

Quack

One might use the word quack, at high school, to alarm friends that a teacher is approaching and they should stop doing whatever it os they're doing wrong.
If a friend is smoking or on their phone, say 'Quack,' to casually tell them a teacher is approaching.
by do dogsarecool September 24, 2017
mugGet the Quackmug.

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