Gack

A phrase used to express disgust

*Cheryl kissed him*
Simon: Gack! Get your disgusting lips off of me, pig!
Cheryl: Why?
Simon: I found out you hated anime.
Cheryl: You meanie!!! *cries*
Simon: Yeah, get the fuck out and sob all you want!
Cheryl: Cartoon porn addict!!! *continues crying*

by Matt_The_Anime_Man April 24, 2020

Gack

Acronym: God-Awful Cornholed Kook

Usually referring to a person who participates in anti-social behavior. Can refer to, but is not limited to:

-Internet Trolls
-Anti-Furries
-Bloxheads (Toxic Roblox Players)
-Stans (Especially the ones obsessed with authoritarian/fascist/terroristic ideologies)
-Etc.

"That user there? I heard he's an anti-furry."
"Great, another screwball gack on the loose."

by BarrelOfRadioactiveIceCream July 18, 2024

Gack

A great and loyal friend, a super talented artist and also really funny and kind

I love gack /p

by Ziolaa November 29, 2022

Sprackle gacked

It is the next level up from being tracked. High as a kite.

Joe is absolutely sprackle gacked!

by Ebola squad September 16, 2025

Gack

A word used by a fucking idiotic British person who tried to create his own language while playing video games on YouTube.

Gavin of Achievement Hunter used the word 'gack' and was promptly called a fucking idiot.

by Uncle Steve The Crack Addict June 14, 2016

Gacked

A state of hightned awareness and focus attained through copious amounts of meth use and prolonged lack of sleep.

"man that neighbor is mowing his yard again,doesn't he know it's three am?!man he's gacked!"

by anonymous October 27, 2021

gack

a person who can’t handle his alcohol and prefers overweight women

oh no thats his 5th beer, he will probably be a gack and try plug a fatty tonight

by handlemart42 July 24, 2023