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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 15, 2016


Gack

Gay black person

Man that guy is a gack!

Speaking straight facts there brotha!!

by CreatorOfGack May 5, 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


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 19, 2024


Gack

The termgack” refers to someone who wants to have hot steamy sex.

Gack! Let’s go to your room.

by ProfessionalDictonary September 26, 2021


gack

A dark substance composed of melting snow, dirt, spilled beer, and a powerful mix of other excretions and spillings that stained SUNY @ Oswego students' shoes/boots after an evening imbibing at such places as Broadwell's and Buckland's (mid 80's through early 90's).

Doug: Yo, Dave, what the fuck is on your boots?

Dave: It's gack from Broadwell's last night.

by MoshKing88 March 10, 2023