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Short for "exactly." Used mostly in text or other digital messaging media when you are in a hurry, or want to sound like a hip young person who knows what's up.
(sends friend a meme about how they only need a 398% on their final to pass a class)
Friend: "My microeconomics class!"
Me: "Zack!"

(gets in argument with friend that culminates in saying "We can agree to disagree")
Friend: *shrug emoji, eye roll emoji*
Me: "Zack."
zack by tatstah June 17, 2018
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A really caring guy, who never fails to look after others, putting them before himself. He is attractive and a huge nerd, and will make you feel safe and loved. He has an excellent music taste and his style will always amaze you.
I love Zack, isn't he just the greatest
Zack by I'mnotafurry:0 January 2, 2019
Zack is a cunt and he has definitely not showered for at least two weeks. He will only date girls who’s age is on a clock and has the IQ of a ham sandwich.
Guy 1: “Did you hear that Zack had sex with a girl half his age?!”

Guy 2: “Typical Zack”
Zack by vegancunt July 10, 2019
Zack is the most amazing person you'll ever meet. He is sweet funny and caring. He forgives you for anything. If you meet a Zack don't mess it up because you will regret it.
He's such a zack
Zack by Tdiistpptusupsr October 12, 2019
"Did you see zack"

"You mean that big ass neechi standing there"
Zack by Whiteneech May 3, 2021
zack by hahabaka December 18, 2021
A fucking weirdo who follows u around and thinks ur friends with him
Ur a Zack
Jeez that’s suck a bad insult
Zack by Grings 123 May 26, 2022