Man that guy is a gack!

Speaking straight facts there brotha!!
by CreatorOfGack May 5, 2021
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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
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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."
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The termgack” refers to someone who wants to have hot steamy sex.
Gack! Let’s go to your room.
by ProfessionalDictonary September 26, 2021
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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
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Someone so high on meth they move uncontrollably. This usually includes wildly exaggerated leg ,hip, arm and butt movement that often look like their moving to some unknown beat and looks like very much like the dance the Elaine character on Sinefeld does.
I can't be around her when she tweeks , she turns into a gack dancer moving all crazy like that.
by Kris burkholder June 8, 2017
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