Quacking is a term which refers to the loud guttural sound which reverberates from a females esophagus as a penis is thrust into it and then removed forcibly creating a suction-force induced sound which resembles the characteristic harsh sound uttered by a duck.
"Yo dude !! - I fucked that bitches throat so deep and hard last night she was quacking! :"GWACK GWACK GWACK GWACK!!!!!!!!"
by Dr Seymour Butts November 25, 2012

“I’m coming for your job mate.”
“Oh no I’m quacking!”
“I’m quacking at the thought that our president will ruin this country.”
“Oh no I’m quacking!”
“I’m quacking at the thought that our president will ruin this country.”
by xJimJam May 13, 2019

by Timmy Sanders April 14, 2006

Expression used when referring to someone that is a duck. Simulates the sound that the animal known as a duck makes. Appropiate when out in public and you see a duck but don't want to risk someone noticing the fact that you are insulting them. Orgin is the show Growing up Gotti, where there is the biggest example of a duck, a gentleman whose actual name is quack quack.
by Gregory G. October 19, 2005

When your dumbass boss or someone in authority tries to tell you what to do or Someone who talks too much.
by John Hopper November 18, 2004

by Stella Lafayette December 04, 2004

by hixvac November 30, 2011
