It is when a girl is having sex and keeps quacking like a baby duck. Then her sex partner eats food and regurgitates the food into the girls mouth or pussy or bum. If it is in the bum they shit it out into sex partners mouth. If in the mouth they eat it. If in the pussy the sex partner licks it out.

Sex Partner : lets quackfack
Girl : who’s doing the quacking
Sex Partner : you
Girl : ah shit here we go again

Quackfack by Incognito unknown uset November 22, 2019

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quackjack

LSD dissolved in Jack Daniels, usually 70 micrograms per shot.

Mary was tossin' back those quackjacks hard until she thought the Easter Bunny was trying to steal her earlobes.

quackjack by MJ Grey August 17, 2007

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quackrack

when one has a rack as if they were quackity

“hows that girl u were with last night?”
“aw man she got that quackrack!!”
thank you for your time :) (also dnf is cool)

quackrack by rebecca-so-rad March 30, 2021

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quackrack

when one has a rack as if they were quackityhq, and ultra mega pogchamp twitch streamer/mcyt

“hows that girl u were with last night??????”
“dang man she got that ultra mega super quackrack 69000!!!!!!!!!!!!!!!!!!!!”

quackrack by rebecca-so-rad March 30, 2021

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