The dreadful, awful, appalling, horrific, horrifying, horrible, horrendous, atrocious, abominable, abhorrent, frightful, fearful, shocking, hideous, ghastly, grim, dire, hateful, unspeakable, gruesome, monstrous, sickening, heinous, vile sound made by a duck/chicken.
"The dreadful, awful, appalling, horrific, horrifying, horrible, horrendous, atrocious, abominable, abhorrent, frightful, fearful, shocking, hideous, ghastly, grim, dire, hateful, unspeakable, gruesome, monstrous, sickening, heinous, vile chicken made a 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.
That is the sound that a duck makes
I don’t know why you’re here
Duck: *quack quack quack*
Other duck: *quack quack quack quack*
Duck: *quack quack, quack quack quack quack*
Other duck: ... *quack*
West London slang for leaving; from “Duck”
“Yo, shall we quack?” “Man quacked!”
Cool and awesome, as if you are an albatross.
Your song sounded so quack tonight.