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.
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

Ginge: *sends meme*
Demb: ...
Ginge: ...
Demb: steals
Parrot: Indomie?!?!?!
Aaron: *sends uk rap*
Red: Hi guys I said hi
Crit: among us
Dis is duck quacks dont echo
Demb: ...
Ginge: ...
Demb: steals
Parrot: Indomie?!?!?!
Aaron: *sends uk rap*
Red: Hi guys I said hi
Crit: among us
Dis is duck quacks dont echo
by ZeroTheImpostor September 29, 2020

by .,.,.,.,..,,. November 21, 2020

by Whoislornsby May 8, 2023

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

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.
by Roachbug August 21, 2010

by Hisoka chan August 16, 2020
